Question What will be the potential energy of a body of mass 5 kg kept at a height of 10 m ?
Q: A 35 kg girl runs up a flight of stairs that is 35 m high. How much work does this require?
A: The work done is equal to the change in gravitational potential energy. that is, W=Uf-UiW=mgh-0W=mgh
Q: What is the work done by the gravitational force on a ball that falls from a roof-top that is 25…
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Q: After scoring a point, a rugby catcher, weighing 84 kg, celebrates by jumping 1.20 m on the ground.…
A: Given : m = 84 kg h = 1.20 m
Q: force of 50.0lbs is used to push a box 10ft. across a level floor. How much work was done on the…
A: Given, Force= 50 lbs Displacement= 10 ft Change in height or level= 0 ft
Q: A spring under a platform is compressed 43.3 cm from its equilibrium position when a 43.4 kg child…
A: In this problem, we are given the mass of the child (m = 43.4 kg) and the displacement of the spring…
Q: A force of 60 N used to push a chair across a room does 300 J of work. How far does the chair move…
A: Applied force (F) = 60 N Work done (W) = 300 Joules
Q: You are a caring a 20 Newton box up a flight of stairs raising its elevation by 5 m. After you drop…
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Q: How much work is done lifting a 2.3 N hamburger a vertical distance of 0.30 meters from the table to…
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Q: Suppose you lift a laptop that weighs 4.4 pounds off the floor onto a shelf that is 3 feet high. How…
A: Given data The mass of the laptop is given as m = 4.4 lb. The height of the lift is given as h = 3…
Q: A 150 g baseball is thrown so it acquired a speed of 20 m/s. Calculate the work done to make it…
A: Mass of baseball (m)=150 g=0.15 kg Speed of baseball after it is thrown (v)=20 m/s
Q: . A 5,000 N force is applied to box at rest on a frictionless horizontal surface. How much useful…
A: Given data: Force (F) = 5000 N Distance (d) = 4 m Angle (θ) = 30°, from the horizontal Required:…
Q: A crane lifts a 320 kg crate up a height of 6.5 m. What type of energy changes occur?
A: Write the given values with the suitable variables. m=320 kgh=6.5 m Here, m is the mass and h is the…
Q: Rank the following from smallest to largest (smallest energy is given the smallest ranking number):…
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Q: A 35 kg child starts from rest at the top of a 4 m high slide. what will be the speed of the child…
A: The child's mass is, m=35 kg The height of the slide is, h=4 m The work done by the friction is,…
Q: A box is pushed a distance of 5 m by a force of 21 N. How much work is done on the box?
A: Force on box =21N Distance travelled by box =5m
Q: Bob lifts three 1x102kg books 2m above the ground. How much work must Bob do to lift one book
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Q: A baby carriage is sitting at the top of a hill that is 21 meters high. The baby carriage with the…
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Q: A bicycle and rider going 14 m/s approach a hill. Their total mass is 93 kg. (a) What is their…
A: Given data: Initial velocity (v) = 14 m/s Mass (m) = 93 kg
Q: Suppose that 3J of work is needed to stretch a spring from its natural length of 30cm to a length…
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Q: A runner with a mass of 40 kg increases his speed from rest to 8 m/s. How much work has she done
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Q: What is the kinetic energy of a 900 kg car moving at 30 km/hr:
A: The mass =900kg To find the kinetic energy
Q: You are bench pressing weights and have a 50 kg mass lifted above your chest. How much work do you…
A: The expression for the required work done is,
Q: alculate potential energy of a rock of 7 kg that is lifted at a height 10 m above the ground.
A: Given Mass of rock is m= 7 kg Height is h= 10 m Acceleration due to gravity is g=9.80 m/s2 Find…
Q: You must exert a force of 6.5 N on a book to slide it across a table. if you do 13 J of work in the…
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Q: Suppose that 48 J of work is needed to stretch a spring from its natural length of 9 m to a length…
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Q: Calculate the kinetic energy and potential energy of a 600 kg car up hill at 20 meters and is runnin…
A: kinetic energy = 12mv2 potential energy = mgh
Q: A 67.5-kg hiker starts at an elevation of 1270 m and climbs to the top of a peak 2730 m high. -…
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- A force of 100 N pushing a 10 kg box over level ground does 300 J of work on the box. Through what distance was the force applied?A spring has a natural length of 6 m. If a 4-N force is required to keep it stretched to a length of 10 m, how much work W is required to stretch it from 6 m to 18 m? (Round your answer to two decimal places.) W = 18 X JA force does 150 J of work on an object as it goes from rest to a speed of 3 m/s. How much work would have been needed for it to go from rest to 6 m/s?
- a person pushes a box 10 meters along the ground using a force of 100 Newton. How much work had been done?A cart is loaded with a brick and pulled at constant speed along an inclined plane to the height of a seat-top. If the mass of the loaded cart is 3.0 kg and the height of the seat top is 0.45 meters, what is the potential energy of the loaded cart at the height of the seat top? Referring to the previous item, what will happen to the potential energy of the cart if its mass increases four times?You lift a 2N rock by 4 m, in 2 seconds. How much work did you do? 8 J 6 J O 12 J O 16 J
- A baseball of mass 1.11 kg is thrown at a speed of 45 miles an hour what is its kinetic energy?the energy needed to increase the speed of a certain car from 22 m/s to 44 m/s is 240 kj. the car is driven up a hill 55m high. what is the change of potential energy of the car ?A bowling ball is lifted to a height so that its potential energy is 20J. If released from rest, how much kinetic energy does the ball have just before hitting the ground?