A 60 kg skier starts from rest at height H = 20 m above the end of a ski-jump ramp (Fig. 8-37) and leaves the ramp at angle 9=28°. Neglect the effects of air resistance and assume the ramp is frictionless. (a) What is the maximum height h of his jump above the end of the ramp? (b) If he increased his weight by putting on a backpack, would h then be greater, less, or the same? H End of- ramp
Q: A snowboarder with a mass of 98kg is initially stationary on a hilltop, then slides down on the…
A: Given Data The mass of the snowboarder is:m=98 kg The coefficient of friction between snowboard and…
Q: (a) How long (in s) would it take a 1.50 x 10 kg airplane with engines that produce of 100 MW of…
A: a) Power is defined as rate of doing work which is given as- P=WtW=workt=timeThe work done by…
Q: (a) How high a hill can a car coast up (engine disengaged) if friction is negligible and its initial…
A:
Q: our students of average mass 80 kg each are raised by the elevator in the ESB building, with the…
A:
Q: A mass on an inclined plane with a length of 4 m and an angle of 39 degrees; the friction…
A:
Q: Calculate the speed of a 2.1 x 10^3-kg car at the bottom of a driveway if it starts from rest at the…
A: The mass of the car is M=2.1×103 kg The length of the driveway is D=5.0 m The angle of inclination…
Q: A cyclist drives off a 30 m high cliff. If her initial speed is entirely horizontal, how fast will…
A:
Q: A 65.0 kg skier with an initial speed of 13.0 m/s coasts up a 2.50 m high rise as shown in the…
A: The mass of the skier, m=65.0 kg The angle of elevation, θ=35° The initial speed of the skier,…
Q: A truck travels uphill with constant velocity on a highway with a 8.5° slope. A 45-kg package sits…
A: a) As the packet is moving with a constant velocity, the initial and final kinetic energy will be…
Q: During a jump on a K-195 ski-jump hill, the skier may leave the ground traveling at about 25 m/s…
A:
Q: While leaning out a window that is 6.4 m above the ground, you drop a 0.60 Determine the following.…
A: The 0.6 kg basketball is dropped from a height of 6.4 m from the ground. After being dropped,…
Q: If a girl releases a stone of 1 kg from the top of a ceiling, both its potential energy and kinetic…
A: Introduction: Capacity of doing work is nothing but the energy. In nature, there are various forms…
Q: A roller-coaster car shown in Fig 6-41 is pulled up to point 1 where it is released from rest.…
A: Let v1, v2, v3, and v4 be the velocities of roller coaster at different points, and h1, h2, h3, and…
Q: cookie jar is moving up a 42 ° incline. At a point 59 cm from the bottom of the incline (measured…
A:
Q: A 50-kg skier with an initial speed of 13 m/s coasts up a 2.5-m-high rise as shown in the figure.…
A:
Q: Question 2) A 6.7 kg object initially starts from rest at the top of a ramp. The length of the ramp…
A:
Q: A cookie jar is moving up a 43 ° incline. At a point 50 cm from the bottom of the incline (measured…
A: Draw the free-body diagram of the cookie jar.
Q: A 233 kg crate hangs from the end of a rope of length L = 14.5 m. You push horizontally on the crate…
A: Mass , m = 233 kg Length , L = 14.5 m Distance , x = 4.95 m To find = a) Magnitude of F→ when the…
Q: A 56.25 kg crate slides down a 36.87° slope (inclined plane) that is 32.00 m in length and has a…
A: Given, mass of the crate, m = 56.25 kgangle of inclination, θ= 36.87 °length, l = 32.00 mcoefficient…
Q: A block of weight 3.6 N is launched up a 30 inclined plane of length 2.25 m by a spring with spring…
A:
Q: A 60.0 kg skier with an initial speed of 10.0 m/s coasts up a 2.50 m high rise as shown in the…
A:
Q: Suppose a sled passenger with total mass 57 kg is pushed 20 m across the snow (u = 0.20) at constant…
A: (a) Using Newton's law, ffr=μkNFcosθ=μkmg-FsinθF=μkmgcosθ+μksinθ Work of applied force is,…
Q: 6 J of work is needed to push an object of mass 2 kg from point A to point B of the frictionless…
A: Here, we define the work done as W=f×d where f is the force and d is the distance traveled. In an…
Q: A 0.40 kg small box starts from rest and slides down a frictionless curved surface ( ¼ of a circle )…
A: Ans 2 given U = αx3
Q: If W(a) and W(g) are workdone on a person by air resistance and gravity respectively, during the…
A:
Q: A 69.0-kg skier with an initial speed of 12.8 m/s coasts up a 2.30-m high rise as shown. Find her…
A:
Q: b) A block slides up a ramp that has an angle of 42° with respect to the horizontal. At the bottom…
A:
Q: What is the work done by the normal force if a 10 kg mass moves 10 m up an inclined plane with…
A: Work done is defined as the Scalar product of force and displacement. W = F•d
Q: 2.5.30. [Level 2] If the free end at A is pulled down at a speed va, what is the resultant velocity…
A: Refer to the figure below :
Step by step
Solved in 2 steps with 2 images
- A 30.0-kg child starting from rest slides down a water slide with a vertical height of 10.0 m. What is the child’s speed (a) halfway down the slide’s vertical distance and (b) three-fourths of the way down? (Neglect friction.)A cookie jar is moving up a 45° incline. At a point 53 cm from the bottom of the incline (measured along the incline), the jar has a speed of 1.6 m/s. The coefficient of kinetic friction between jar and incline is 0.14. (a) How much farther up the incline will the jar move? (b) How fast will it be going when it has slid back to the bottom of the incline? (c) Do the answers to (a) and (b) increase, decrease, or remain the same if we decrease the coefficient of kinetic friction (but do not change the given speed or location)?In the sport of skeleton a participant jumps onto a sled (known as a skeleton) and proceeds to slide down an icy track, belly down and head first. The track has sixteen turns and drops 123 m in elevation from top to bottom. (© Frank Gunn/AP/Wide World Photos) (a) In the absence of nonconservative forces, such as friction and air resistance, what would be the speed of a rider at the bottom of the track? Assume that the speed at the beginning of the run is relatively small and can be ignored. 49.0 m/s (b) In reality, the best riders reach the bottom with a speed of 35.8 m/s (about 91 mi/h). How much work is done on a rider and his sled (assuming a total mass of 85.9-kg) by nonconservative forces? -4.48 X J Additional Materials ab P Tyne here to search
- (1) A 1200 kg roller coaster cart is initially at rest at the top of the track at a height of 20 m above ground. (a) What is the speed of the roller coaster when it reached ground level? (assume no friction in this part of the track). (b) The roller coaster now continues to move horizontally. Find the distance the roller coaster will travel before arriving at a complete stop, if the coefficient of friction between the coaster and the track is 0.3.A cookie jar is moving up a 42 ° incline. At a point 56 cm from the bottom of the incline (measured along the incline), the jar has a speed of 1.2 m/s. The coefficient of kinetic friction between jar and incline is 0.17. (a) How much farther up the incline will the jar move? (b) How fast will it be going when it has slid back to the bottom of the incline? (c) Do the answers to (a) and (b) increase, decrease, or remain the same if we decrease the coefficient of kinetic friction (but do not change the given speed or location)? (a) Number i (b) Number (c) Units UnitsConsider a plane that is inclined by an angle of 45 degrees with the horizontal. A block of mass 5 kg starts at rest at the top of the inclined plane, at a height of 2 meters above the ground. The surface of the plane and the block have a relative coefficient of friction of (μk= 0.1). If the block is allowed to slide down the plane. (a) What is the work done by gravity during the slide down the plane? (b) What is the work done by friction during the slide down the plane? (c) Using the information from (a) and (b), find the speed of the object when it reaches the ground?
- Suppose a box of mass 5 kg is initially at rest on a frictionless horizontal surface. A constant force of 10 N is applied horizontally to the box for 4 seconds, and then a 7 N force of the same direction is applied for another 4 seconds. (a) Find the total distance that the box traveled. (b) Find the total work done on the box.86. A 55-kg skier starts from rest at the top of a ski jump, point A in Fig. 6-48, and travels down the ramp. If fric- tion and air resistance can be neglected, (a) determine her speed vg when she reaches the horizontal end of the ramp at B. (b) Determine the distance s to where she strikes the ground at C. 45.0 m VB FIGURE 6-48 Problem 86. 30,0(1.) An 18 kg crate slides up a 32.0° slope (inclined plane) that is 25 m in length and has a kinetic friction coefficient of 0.36. The crate is given an initial upward speed of 21 m/s as it starts up from the bottom of the slope. Applying the principle of the conservation of mechanical energy in the presence of dissipative forces (friction), determine its final speed as it reaches the top of the slope.
- A crate of mass 9.0 kg is pulled up a rough incline with an initial speed of 1.42 m/s. The pulling force is 110 N parallel to the incline, which makes an angle of 20.6° with the horizontal. The coefficient of kinetic friction is 0.400, and the crate is pulled 4.92 m. (a) How much work is done by the gravitational force on the crate? |-152.68 (b) Determine the increase in internal energy of the crate-incline system owing to friction. 33.02 A careful free-body diagram of the crate may help you determine the magnitude of the friction force. J (c) How much work is done by the 110-N force on the crate? 541.2 (d) What is the change in kinetic energy of the crate? 355.5 You appear to have calculated the change in kinetic energy correctly using your incorrect results from the previous parts. J (e) What is the speed of the crate after being pulled 4.92 m? 9 You appear to have calculated the speed correctly using your incorrect result from part (d). m/sDisregarding friction, a roller coaster with a vertical drop of 46 m will achieve a speed of about 30 m/s. If the height of the drop is doubled, how much the speed is going to be?A wood block weighing 1kg slides upward on a ramp with an initial velocity of 20m/s at point Aalong the ramp. What is the maximum height from point A can the ramp go if the ramp isinclined at 25 degrees and the coefficient of friction is 0.2 between the ramp and the woodblock.