1. What is the work done by GRAVITY if a 50kg block is pushed along a 4m horizontal track? a. 1960 Joules c. 13 Joule  b. Zero Joules d. 540 joules 2. An American ski jumper, has a mass of 59.6 kg. He is moving at a speed of 23.4 m/s at a height of 44.6  meters above the ground. Determine the total mechanical energy of the jumper.  a. 4.42 x 104  b. 4.24 x 10 -4  c. 4.24 x 10 3  . 42. 24 x 104 J

Q: A cannonball with mass 20 kg is fired from a cannon sitting at the top of a 30-m tall hill. The…

A: Formula of initial kinetic energy is as follows: Ki=12mu2…

Q: Which of the following statements are TRUE about conservative and non-conservative forces? Explain…

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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: 1. A car starts at rest, and ends up with 1500 J of KE. How much Work was done on it?

A: As per our guidelines, we are supposed to answer only first one question in case of multiple…

Q: During the Powerhouse lab, Gab runs up the stairs, elevating his 98 kg body a vertical distance of 3…

A: Given: The mass of the object is 98 kg. The vertical distance covered by the object is 3 m. The time…

Q: 6. A 0.150 kg baseball is moving 20.0 m/s. A bat hits it, doing 15.0 J of Work on it. What is the…

A: work energy theorem Wnet=change in kinetic energyWnet=∆KEWnet=KEfinal-KEinitialWnet=…

Q: One of the largest waterfalls in the world, the Iguazu Falls, are located on the border of Argentina…

A: Given: Mass of the log (M) = 1350 kg Velocity of the log before the fall (u) = 7 m/s Velocity of the…

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: box of 18kg is released from rest on a rough inclined plane and slides to the bottom. The plane is…

A: Here Mass of a box = 18kg released from rest on a rough inclined plane and slides to the bottom.…

Q: 3. During a flood a tree truck of mass 100 kg falls down a waterfall. The waterfall is 5 m high. If…

A: Given: Mass of the tree truck = 100 Kg Height of the waterfall = 5 m ignoring air resistance

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 weighlifter lifts a 50-kg barbell a vertical height of 2.0 m in 5.0 s. What is the average power…

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Q: In the figure shown, if the mass (m=6 Kg) is moving with constant speed and traveled a distance…

A: In the given question, we have to find the work done by the frictional force in moving a distance of…

Q: 1. A Roller Coaster showing in the picture bellow of mass of M = 149 Kg is moving through the 3…

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Q: A 80-N constant force exerted on a 15-kg object for 12 seconds. The initial velocity of an object is…

A: ANS(a) Given :                Force = F = 80 N              mass = m =15 kg                time = t…

Q: 2. Larry and Moe carelessly lean against a 300 kg piano. It teeters off the edge of a 1.50 meter…

A:

Q: 1. A 0.14 k-g pine cone falls 16m to the ground, where it lands at a speed of 13 m/s. (a) With what…

A:

Q: A block with a mass of 5.0 kg and an initial speed of 2.0 m/s comes to rest after sliding for about…

A: Given  mass of block, m = 5 Kg Initial speed of block, Vi = 2 m/s As the blocks comes to rest after…

Q: 2. A bowler lifts a bowling ball from the floor and places it on a rack. If you know the weight of…

A: Given,             we know that ,weight of the ball Here, work done =change in potential energy…

Q: An accelerating object of mass m=2 kg is fired with an initial speed v=8 m/s at a starting point. If…

A: Given data: Mass m =2 kg Velocity v=8 m/s2. Final Kinetic energy =268 J

Q: . A large box slides first up, and then down, an incline. The incline has friction. Which of the…

A: Friction force tends to oppose the motion relative to the surface in contact. Thus friction force…

Q: Which, if any, of the following statements concerning the work done by a conservative force is…

A: Conservative force  The force by which work done doesn't depends on path is called conservative…

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: 2. A 59 kg person climbs up the stairs with a height of 5.5 m. a.How much work does the person do?…

A: Given , Mass of person( m) = 59 kg Height climbed by person (h)= 5.5 m

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: 2. A 10-kg mass is dragged on a horizontal frictionless surface by a force F(x) = 2x + 1 (N) that…

A:

Q: 15. A car is traveling to the right at 20 m/s, which gives it a kinetic energy, K. A second…

A:

Q: 8. A block is moving with 52.0 J of KE. A 12.0N force pulls the block straight forward for 3.00 m.…

A:

Q: The work done in stretching a spring-mass system a distance x from its rest position is U = kx² /2.…

A: Solution - We are given that the work done in stretching the spring-mass system a distance x from…

Q: A 5.5 kg bird is flying 12 m above the ground. What is the Potential energy of the bird is…

A: Mass of bird (m) = 5.5 kg Height of bird above ground (h) = 12 m g = 9.8 ms2

Q: DIOO R 13 WILI stance of 6m down th How much work is What is the average

A: 8(A)Given values:- Mass of the block,(m)=5 kg ----(1) Speed of the block,(v)=6 m/sec ----(2) Height…

Q: As a woman carries her suitcase up a flight of stairs, she does work against gravity. If the mass of…

A: mass of suitcase (m) = 10 kg Height of stairs (h) = 12 m g = 9.8 ms2

Q: A 0.30 kg soccer ball is released from the top of a 10 m building. The ball strikes the ground with…

A: The velocity of a ball freely dropped from a height is given by v = 2gH, where g = acceleration due…

Q: 4. Gillian places a ball on a table at a height of 3.2 m. Afterward, she places it on a table at a…

A:

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…

A:

Q: what is the kinetic energy in joules of a 1120-kg automobile traveling at 88 km/h?   2. how much…

A: Given, Mass, m = 1120 kg Speed, v = 88 km/h = 88×518=24.44 m/s

Q: 17. A 10.0-kg rocket is fired vertically from Cape Canaveral. Its fuel gives it a kinetic energy of…

A:

Q: The gravitational potential energy of a 500kg elevator at the top of a building, 450m above the…

A: mass=m=500 kg h=450 m PE=mgh g=9.8 m/s^2

Q: An accelerating object of mass m=5 kg is fired with an initial speed v;=9 m/s at a starting point.…

A:

Q: III. WORK 8. How much work was done by a machine that exerts a 5000 N force to compress a…

A: Given, Force applied by machine, F = 5000 N compress a 10 m long steel bar so it becomes 3 m

Q: 1. A block of mass 12.0 kg is placed on a rough incline with an angle of 30° (g = 10 m/s²). The…

A: Consider the following diagram A block of mass m=12kg is on an inclined plane. The forces acting on…

Q: 7. Weight = 200 N. distance = 1.50 m. a Find the minimum work done to lift an object 1.50 m b When…

A: Solution for this question has been given below..

Q: A block is moving with 52.0 J of KE. A 12.0 N force pulls the block straight back, against the…

A: Given data: Initial Kinetic Energy (KEi) = 52.0 J Force (F) = 12.0 N, straight backward Displacement…

Instantaneous Power

Power is defined in physics as the amount of energy transmitted or transformed per unit time. The watt is the unit of electricity in the International System of Units, equivalent to one joule per second.