1. A 5.5 kg bird is flying 12 m above the ground. Potential energy of bird is calculated to be ? use g =9.8m/s². Do not round your answer and choose one correct answer with correct unit of measure of potential energy. A. 64.68 J/s B. 646.8 J/s C. 646.8 Joules (J) D. 64.68 J
Q: 2. A 60 kg skier slides down a hill, and their potential energy versus horizontal position (x) is…
A:
Q: A 75 kg runner has a speed of 5.45 m/s. What is the runner's kinetic energy?
A: Mass of the person is m=75 kg Speed of the person is v=5.45 m/s Note: 1 N=1 kg·m/s2 1 J=1 Nm 1…
Q: 3. Consider a 65-kg object moving at a speed of 12 m/s. Use work and energy to solve for the…
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Q: How much work do the breaks on a 3200 kg car need to do in order to slow it from 30 m/s to 20 m/s?
A: Given mass m=3200Kg V1=30m/s V2 = 20m/s According to work energy theorem work done by the car is…
Q: 4. A driver initially at rest accelerates her 1500 kg car to a final velocity of 30 m/s. a. What is…
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Q: 6. You notice that an object is moving from point A to point B. The object measures a kinetic energy…
A: Given data: The kinetic energy at A is KE=6.75 J. The speed at A is vA=4.25 m/s. The speed at B is…
Q: How much potential energy does a 7.5 kg ceiling fan have with respect to the floor when it is 3.0 m…
A: Given Data :mass of the ceiling fan m = 7.5 kgheight of ceiling fan with respect to floor h = 3 mlet…
Q: A 1.0 kg baseball is flying at 10 m/s. How much kinetic energy does it have? Potential energy? a. 10…
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Q: A 5 kg book is held 10 meters above the floor. How much gravitational potential energy does it have?…
A: Mass(m) = 5 kg Height(h) = 10 m Potential energy (E) = mgh g = gravitational acceleration g = 9.8…
Q: A 4000 gram object has a kinetic energy of 50 Joules. What is the speed of the object? A. 5…
A: Given Data:- Mass of the object is m=4000 g =4000 g×1 kg1000 g =4 kg Kinetic energy of the…
Q: How much work (in J) must be done to lift a stack of bricks, which has a mass of 50 kg, from the…
A: Given data The given mass is m=50 kg The height is h=8 m The accleration due to gravity is g=10 m/s2…
Q: 36.) When a 2.0 kg science textbook is sitting on a table that is 2.0 meters above the floor, how…
A: It is given that,
Q: 1. A 6.2kg box is moving at 2.4m/s to the left. a) What is its kinetic energy? 2.4m/s 6.2kg b) How…
A: Given data: Mass (m) = 6.2 kg Initial velocity (u) = 2.4 m/s Work done by the friction (W) = -4 J…
Q: A 0.60 kg rubber ball is thrown into the air. At a height of 30 m above the ground, it is travelling…
A: Given: Mass,m=0.60kgAcceleration due to gravity,g=9.8m/s2Height,h=30mVelocity,v=18m/s An object's…
Q: A 25 kg box is pushed up a ramp that makes a 15 degree angle with the horizontal. The ramp is 15…
A: (a)Work done by ramp is zero when friction is negligible. (b)Work done by gravity is:-…
Q: The kinetic energy of a 3.0 kg object moving at a speed of 9.3 m/s would be: a. 130 J b. 260 J…
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Q: A 2.00-kg (20.0-N) stone is dropped from a height of 5.0 m, and strikes the ground with a velocity…
A: Weight of stone (w) = 20 N Mass of stone (m) = 2 kg Initial height (h) = 5 m Velocity with which the…
Q: What is the kinetic energy of a 1400 kg car traveling at 5.3 m/s? A. 7.4 x 103 J B. 2.0 x 104 J…
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Q: A 13 kg mass object initially has 2500 J of kinetic energy. -1200 J of net work is then done on the…
A: Given: The mass of the object is 13 kg. The initial kinetic energy of the object is 2500 J. The net…
Q: 4. An object is released from rest at X and slides to Y. The vertical distance between X and Y is 10…
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Q: What is the gravitational potential energy of a 50 N bird at a height of 50 meters? A. 2500 J…
A: Given Data : The weight of the bird is given as W = 50N. The height of the bird is given as H = 50m.
Q: A 95 kg man runs up a 20 m high stairs at a constant speed. If it takes him 8 seconds to reach the…
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Q: What is the gravitational potential energy of a 300 N cat at a height of 6 meters? A. 183 N B.…
A: Option C Is the right answer 1800 J
Q: How much Gravitational Potential Energy does 5000 gallons (18,925 kg) of water have in a 50 meter…
A: Solution: Given that mass of water m = 18925 kg height from the earth surface = 50 m
Q: 1978M1. An amusement park ride consists of a ring of radius A from which hang ropes of length éwith…
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Q: 1-kg book is thrown from a height of 5 meters with a speed of 20 m/s. Compute the total energy when…
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Q: 29. In problem no.28, in a simple rectilinear * motion, a mass of 100 Kg is given an acceleration of…
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- 7. A ball is thrown straight up. Neglecting air resistance, which statement is not true regarding the energy of the ball? a. The potential energy decreases while the ball is going up. b. The kinetic energy decreases while the ball is going up. c. The sum of the kinetic energy and potential energy is constant. d. The potential energy decreases when the ball is coming down.2. A hand gun fires a 7.50g bullet at a speed of 377m/s. A. Calculate the bullet's kinetic energy. B. At what speed (km/h) must a motorcycle of mass 170kg move to have the same kinetic energy?A 5.00 gram bullet moving horizontally with a speed of 400 m/s collides with a wooden block. After moving 2.00 cm into the block the bullet stops moving. Was work done on the bullet? If so describe the type of work and the force that did the work. a. yes, negative work, force is in the opposite direction as the initial velocity of the bullet b. yes, positive work, force is in the same direction as the initial velocity of the bullet c. yes, positive work, force is in the opposite direction as the initial velocity of the bullet d. No work was done on the bullet e. yes, negative work, force is in the same direction as the initial velocity of the bullet
- 2. A 900 kg elevator is raised by an electric motor up from the basement to the third floor, a vertical distance of 9.9 m, over the course of 5 s. There's a friction force of 125 N between the elevator and the elevator shaft. A. Draw a free body diagram of the elevator. Which forces are conservative? Which forces are dissipative? Which are external? B. How much potential energy does the elevator gain as its lifted? C. What is the work done by friction on the elevator? Is it positive or negative?A spring with spring constant k is attached to the floor, standing vertically. You place a box of mass m on the spring and, from rest, release it. The spring bounces up and down a few times and comes to rest (both its velocity and acceleration are zero). Find the thermal energy generated in this process in terms of m, g, and k. Answer Options: A. mg/k B. m^2 g/k C. m^2 g^2/k D. m^2 g^2/ 2k E. mg/2k8. A ball has a 17 J of kinetic energy and its mechanical energy is 25 J. Find the potential energy of the ball. a. b. If the ball has a mass of 3.2 kg, what is its height above the ground? c. What is the speed of the ball?
- QUESTION 11 Starting from rest, a ball of mass 3 kg experiences a constant force of 9 N. What is the final kinetic energy (in J) of the ball after it has traveled a distance of 8 m? A. 216J B, 72J C.3J D. 24J E, 27J3. An elevator starts from the third floor and moves downward. The v-t graph of a person riding the elevator is given below: t₁ = 0.9 s,t₂ = 1.9 s, t3 = 4.5 s, tv = 7.7 s, v = -1.0 m/s Velocity (m/s) (a) Draw FBD for the person riding the elevator for following cases: Speeding Constant moving Time (s) Slowing (b) What is the apparent weight (in N) of a 50.0 kg person when he/she is slowing down? (Use g = 10 N/kg). Speeding Constant moving Slowing45. A 20 kg crate slides down a 10 m high 30 degree incline with a frictional coefficient of .100. What is the speed of the crate at the bottom of the incline?A. 4.5 m/sB. 12.7 m/sC. 6.35 m/sD. 10 m/s
- I need help with these questions2. A ball is dropped from the top of a building. You choose the top of the building as a reference point while your friend chooses the bottom as the reference point. Explain whether the energy calculated using the two different reference points are same or different. a. The ball PE at any point b. Change in PE as a result of the fall KE at any point C.2. A 3.2 kg ball that is moving straight upward has 17 J of kinetic energy and its total mechanical energy is 25 1. a. Find the gravitational potential energy of the ball. b. What is its height above the ground? c. What is the speed of the ball? d. What will be its gravitational energy when it is at Its highest point above the ground? e. What is the maximum height above the ground? f. What will be its speed Just before it lands on the ground? and Given: quired: ution: