You shoot a bullet aiming to a far away tree. The bullet is 15.0 g and it embedded 15.0 cm into the trunk of a tree. If the speed of the bullet just before entering the tree is 120.0 m/s, a) How much work is done by the average force? b) what is the average force exerted on the bullet by the tree? c) What is the average acceleration of the bullet in the tree?
Q: A worker pushes a 30.0-kg crate a distance of 4.5 m along a level coefficient of kinetic friction…
A:
Q: A constant force F = (8i + 6j ) N acts on a particle as it moves along a straight line path. If the…
A:
Q: The work done by a force that varies in magnitude can be obtained from which of the following…
A:
Q: A force acts on a particle, which is initially at rest; the force is F=(3i+4j)N. The particle is…
A: (a)The displacement of the particle is given by,…
Q: A constant force F = 5.0 N (i hat) + 2.0 N (j hat) opposes the motion of a block as it slides from…
A: The equation for the work done is
Q: A 1.5 kg hockey puck initially moving at 4.9 m/s slides 12 m along the ice before coming to rest.…
A:
Q: An 80N force was applied to a box at an angle of 55°. How much work was done to the object if it…
A:
Q: How much work was done on him by gravity?
A:
Q: Problem #2: A force F(x)=(-3.0x²+4.0) N acts on a particle. a) How much work does the force do on…
A:
Q: An assistant for a football team carries a 32.0 kg cooler of water from the top row of the stadium,…
A: The expression to solve for the work done by the assistant is as follows: WA=KEf-KEi+PEf-PEi…
Q: The horizontal force on the car varies with x as shown in the figure. What is the work done on the…
A: Page 1Figure:
Q: Question #: 19 An object of mass 2.0 kg moves in the north direction on a level ground. One of the…
A:
Q: A 1100 kg. car coasts on a horizontal road with a speed of 19 m/s. After crossing an unpaved, sandy…
A: Mass, m = 1100 kg Initial speed of car, u = 19 m/s Final speed of car, v = 12 m/s
Q: C4. In the general expression for the work W by a force F, W = F. ds, the vector ds is... a small…
A: Answer C4: The correct options is C i.e, a small element of displacement of the point of application…
Q: You push a crate up a ramp at a constant velocity. Which force does the greatest magnitude of work…
A:
Q: A force acts on a particle which moves from the origin to point C. The particle can travel along…
A: Given: The work done by the force for each path: WOBC = 50 J, WOAC = 125 J, WOC = 66.7 J. The work…
Q: A particle moving along the y-axis has the potential energy U = 3y³ J, where y is in m.
A: Given data: Potential energy as function of y U = 3y3 J y in m Required: The y-component of the…
Q: A force F =(4xi+3y N acts on an object as it moves in the x direction from the origin to x= 4m. The…
A:
Q: A worker pushes a m = 2.00 kg bin a distanced= 5.20 m along the floor by a constant force of…
A: We will use work done formula in this problem,
Q: Please I need help!, answers these questions, A.B.C
A: For which of the following situation no work is done.
Q: While shopping in a mall, Abdullah helped his mother by pushing a trolley of mass 32kg at a constant…
A: \
Q: The only force acting on a 4.0 kg canister that is moving in an xy plane has a magnitude of 5.5 N.…
A:
Q: Bruce Springsteen is leaving the United States. He applies a constant force of 20 N to his suitcase…
A: Given: The applied force is 20 N 25o above the horizontal. The mass of the suitcase is 8 kg. The…
Q: Physics 3 a) How would you demonstrate, using a pen and a sheet of paper, that static friction can…
A: Work done is defined area under Force v/s displacement graph. If force is constant then in vector…
Q: A force F = Fi + Fyj + F₂k acts on a box of dehydrated potatoes as it moves from the origin to point…
A: According to question we need to find work done by the force.
Q: 61 kg skier on level snow coasts 179 m to a stop from a speed of 12.4 m/s. a)Use the work-energy…
A:
Q: saltwater crocodile (Crocodylus porosus) with a mass of 521 kg, is seen chasing prey and reaching a…
A:
Q: Let's say the Earth moves around the Sun in a circular orbit with a constant speed (neither is…
A: The correct answer is B. The work done on the Earth is zero, since the force of gravity is always…
Q: a) determine the force exerted on the piano by the man. b) determine the work exerted on the piano…
A: The free-body diagram of the scenario is given as, Given, Mass, m=390 kg, distance it slides, d=…
Q: A force is acting on a 2.00 kg particle whose position changes with time as x = 4.0 t - (1/3) tº,…
A: Mass of particle is m=2 kg Position of particle as a function of time is xt=4t2-1/3t3; here x is in…
Q: A particle experiences a variable force F= (2+2x+ x^2)N that acts in the x direction. The work done…
A:
Q: 8.) When a force acts on an object from an angle other than either 0° or 180° to the direction of…
A: When a force acts on an object from an angle other than either 0° or 180° to the direction of motion…
You shoot a bullet aiming to a far away tree. The bullet is 15.0 g and it embedded 15.0 cm into the trunk of a tree. If the speed of the bullet just before entering the tree is 120.0 m/s,
a) How much work is done by the average force?
b) what is the average force exerted on the bullet by the tree?
c) What is the average acceleration of the bullet in the tree?
a)
The work done is change in kinetic energy.
therefore,
b)
The average force is,
The negative sign indicate that the force is against the motion of the bullet.
Step by step
Solved in 2 steps
- A man cleaning a floor pulls a vacuum cleaner with a force of magnitude 60.0 N at an angle of 20 degrees from the positive x axis. Calculate the work done by the man s force on the vacuum cleaner as the vacuum cleaner is displaced 2.00 m to the right? O 141 J O 113 J O 60 J O 47 JA 5 kg ball is shot straight up with an initial speed of 20 m/s . When the ball reaches height 10 m, the balls speed is 10 m/s. The work done on the ball by the force of air resistance , up to this height is equal to? A- 260J B- 490J C- 500 J D- 510J E- 750JAn uncontrolled 850 kg car strikes squarely a motorway crash cushion in which the car is brought to rest by successively crushing steel barrels. The length of the crash cushion is 5.9 m, and the magnitude F of the force required to crush the barrels as a function of the distance the car has moved into the cushion is given by (image attached) a) Determine an expression for the work done by the force Fas a function of x b) If the car strikes the crash cushion with a velocity of 38km / h , determine the distance the car will move into the cushion before it comes to rest and the maximum deceleration of the car. c) Determine the maximum velocity with which the car can strike the cushion so that it will not hit the wall behind the cushion.
- 1. Boxing gloves are padded to lessen the force of a blow. The glove and face compress 7.5000 cm during a blow in which the 7.0000-kg arm and glove are brought to rest from an initial speed of 10.0000 m/s. ▬▬ - Think & Prepare 1. Make note of what's given and what's unknown. Relate known quantities to symbols. 2. Draw a labeled sketch if possible. 3. Identify the physics principle and approach. Write down relevant equations symbolically. Simplify if possible. 4. Insert numerical quantities to solve for unknowns. 5. Does the answer make sense? % (a) Calculate the change in kinetic energy of the glove and arm. AKE = (b) Where does this energy go? O Search 5 O into doing work against the force exerted by the face against the glove O into doing work against gravity O into the potential energy of the face O into the potential energy of the glove and arm T 4- 6 Y 17 + & J 7 90 8 * 8 U I 이 144 ( 9 110 DII O E DDI I P 2 { 4 ( ← backsA 6.50 kg box slides 4) from the top of a ramp to the bottom at a constant speed, as shown in the diagram. constant v= 1.50 m/s h= 1.85 m 0= 28.2° a) How much work is done on the box by the frictional force? b) How much work is done on the box by gravity? c) How much work is done on the box by the normal force? d) What is the coefficient of kinetic friction between the box and the ramp?Your answer is partially correct. A floating ice block is pushed through a displacement d 27.0 m Ji - (24.0 m )j along a straight embankment by rushing (298 N )i – (183 N ) water, which exerts a force on the block. How much work does the force do on the block during the displacement? Number i 3654 Units
- An object of mass m can only move on the +z axis. It is subjected to a force in the +z direction given by F(x) = the origin. a. How much work does this force do if the object moves from z = a b. If at a the block had an initial velocity of magnitude vo in the +z direction, what is its velocity at b if no other force is acting on the object? am where a is a constant and z is the distance from to z = b?7. A student in a lab exerts a 25 N force to pull a block a distance of 48 cm. If a total of 11 J of work is done, the angle between the force and the displacement is a. 89° b. 66° d. 24° e. none of the above c. 61° 8. A 102-g sparrow flying at 12.3 m/s wishes to have equal kinetic and gravitational potential energies. The height that will accomplish this is a. 0.315 m b. 0.628 m d. 1.13 m e. 7.72 m c. 0.787 m 9. Earth's mass is 5.98 x 1024 kg. Calculate the value of g at a point 4.8 x 105 km from the centre of Earth. a. 9.8 × 102 N/kg b. 8.3 x 10' N/kg C. 1.7 × 103 N/kg d. 1.7 x 10³ N/kg e. 9.8 × 105 N/kg 10. A piece of paper becomes electrically charged when a charged rod of plastic is placed close to it. This is referred to as a. charging by a conductor b. charging by induction c. charging by an insulator A P d. charging by contact e. charging by electricity 20 cm Ꭰ T 20 cm 11. Four charged spheres, A, D, P, and T are arranged as shown below. Sphere A has a charge of +4.5 × 10*C,…▾ Part A A system of two objects has AKtot 7 J and AUnt=-3 J. = Vocals Search B N How much work is done by interaction forces? Express your answer in joules. Wint ΜΕ ΑΣΦ Submit Previous Answers Request Answer X Incorrect; Try Again; 3 attempts remaining Part B How much work is done by external forces? Express your answer in joules. Wat ΜΕ ΑΣΦ Submit Request Answer Provide Feedback msi ENTER SHIFT ? J J NO.
- The only force acting on a 4.1 kg canister that is moving in an xy plane has a magnitude of 2.6 N. The canister initially has a velocity of 3.5 m/s in the positive x direction, and some time later has a velocity of 7.8 m/s in the positive y direction. How much work is done on the canister by the 2.6 N force during this time? Number i Units (>)The only force acting on a 2.0 kg canister that is moving in an xy plane has a magnitude of 5.7 N. The canister initially has a velocity of 4.5 m/s in the positive x direction, and some time later has a velocity of 4.8 m/s in the positive y direction. How much work is done on the canister by the 5.7 N force during this time? Number i UnitsA factory worker moves a 23.0 kgkg crate a distance of 4.50 mm along a level floor at constant velocity by pushing horizontally on it. The coefficient of kinetic friction between the crate and the floor is 0.300. What magnitude of force must the worker apply? How much work is done on the crate by the worker's push? How much work is done on the crate by friction? How much work is done by the normal force and by the gravity? What is the net work done on the crate?