kinetic energy numericals

Kinetic energy numericals

1: A ball has a mass of 2Kg, suppose it travels at 10m/s. Find the kinetic energy possessed by it. 

2.A ball has a mass of 10Kg, suppose it travels at 100m/s. Find the kinetic energy possessed by it. 

3.A spaceship has a mass of 20000Kg, suppose it travels at 10m/s. Find the kinetic energy possessed by it. 

4.Work done by a force on a moving object is 100J. It was traveling at a speed of 2 m/s. Find the new speed of the object if the mass of the object is 2Kg.

5.Work done by a force on a moving object is -50J. It was traveling at a speed of 10m/s. Find the new speed of the object if the mass of the object is 2Kg.

6.Suppose a 1000Kg was traveling at a speed of 10m/s. Now, this mass transfers all its energy to a mass of 10Kg. What will be the velocity of the 10Kg mass after being hit by it? 

7.Suppose a 10Kg was traveling at a speed of 100m/s. Now, this mass transfers all its energy to a mass of 20Kg. What will be the velocity of the 20Kg mass after being hit by it? 

8.Suppose a 10Kg was traveling at a speed of 100m/s. Now, this mass transfers all its energy to a mass of 20Kg. What will be the velocity of the 20Kg mass after being hit by it? 

9.Suppose a 10Kg was kept at 20m height. Now, this block is dropped. Find out the velocity of the block just before it hits the ground.

10: Suppose a rock of 100Kg was kept at 80m height. Now, this block is dropped. Find out the velocity of the block just before it hits the ground.

11. A car is travelling at a velocity of 10 m/s and it has a mass of 250 Kg. Compute its Kinetic energy?

12.A man is transporting a trolley of mass 6 Kg and having Kinetic energy of 40 J. Compute its Velocity with which he is running?

13.• A car with a mass of 700 kg is moving with a speed of 20m/s. Calculate the kinetic energy of the car.

14• A cyclist and bike have a total mass of 100 kg and a speed of 15 m/s. Calculate the kinetic energy.

15• A tennis ball is traveling at 50 m/s and has a kinetic energy of 75 J. Calculate the mass of the tennis ball.

16• A 30 gram bullet travels at 300 m/s. How much kinetic energy does it have?

17• A 70kg man runs at a pace of 4 m/s and a 50g meteor travels at 2 km/s. Which has the most kinetic energy?.

18• A 5000kg truck has 400000J of kinetic energy. How fast is it moving?

19• A car traveling at 10 m/s has 200000J of kinetic energy. What is the mass of the car?

20A light and a heavy object have the same momentum. Find out the ratio of their kinetic energies. Which one has a larger kinetic energy?

21.An object with 100 N weights is raised to a height of 15m. Find the potential energy possessed by the object at that height. Also find the new potential energy:
a.If the same object is raised half of its original height.
.If the same object is raised to three times of its original height?
Given g=10m/s2

22.Define one joule of kinetic energy?

23.ball of mass 2kg is thrown up with a speed of 10m/s. find the kinetic energy of the ball at the time of throwing. Also find the potential energy of the ball at the highest point?

24.An object of mass m and velocity v has kinetic energy= 200J. Find the new kinetic energy if the mass of the object becomes double and velocity still remains the same?
Answer

25.Calculate the kinetic energy of a car of mass 500kg moving with a velocity of 36km/h. Find the kinetic energy if the velocity of car doubles?

26.Calculate the power of an electric motor that can lift 800 kg of water to store in a tank at a height of 1500cm in 20s. (g=10m/s2).

27.Calculate the electrical energy consumed in Joules if a toaster of 60 W is used for 30 minutes?

28.An electric heater of 1000 W is used for two hours in a day? What is the cost of using it for a month of 28 days, if one unit costs 3.00 rupees?

29.Two bodies of equal masses move with the uniform velocities v and 3v respectively. Find the ratio of their kinetic energy?

30.kinetic energy of a car is 7000 J as it travels along a horizontal road. How much work is required to stop the car in 20 s?
Answer

31.Determine the kinetic energy of a 625-kg roller coaster car that is moving with a speed of 18.3 m/s.

32.the roller coaster car in the above problem were moving with twice the speed, then what would be its new kinetic energy?

33 Missy Diwater, the former platform diver for the Ringling Brother's Circus, had a kinetic energy of 12 000 J just prior to hitting the bucket of water. If Missy's mass is 40 kg, then what is her speed?

34.. A 900-kg compact car moving at 60 mi/hr has approximately 320 000 Joules of kinetic energy. Estimate its new kinetic energy if it is moving at 30 mi/hr. (HINT: use the kinetic energy equation as a

35.. An object moving with a speed of 67 m/s and has a kinetic energy of 500 J, what is the

36. What is the Kinetic Energy of a 478 kg object that is moving with a speed of 15 m/s?

37.An object has a kinetic energy of 88 J and a mass of 45 kg , how fast is the object moving?

38.. An object moving with a speed of 21 m/s and has a kinetic energy of 140 J, what is the
mass of the object.

39.What is the Kinetic Energy of a 100 kg object that is moving with a speed of 12.5 m/s?

40.What is the Kinetic Energy of a 150 kg object that is moving with a speed of 15 m/s?

41.. An object has a kinetic energy of 25 J and a mass of 34 kg , how fast is the object  moing

42.. An object moving with a speed of 35 m/s and has a kinetic energy of 1500 J, what is
the mass of the object.

43. What is the Kinetic Energy of a 1200 kg object that is moving with a speed of 24 m/s?

44.An object has a kinetic energy of 14 J and a mass of 17 kg , how fast is the object

45.car with a mass of 700 kg is moving with a speed of 20m/s. Calculate the kinetic energy of the car.

46.A cyclist and bike have a total mass of 100 kg and a speed of 15 m/s. Calculate the kinetic energy.

47.A tennis ball is traveling at 50 m/s and has a kinetic energy of 75 J. Calculate the mass of the tennis ball.

48.A 30 gram bullet travels at 300 m/s. How much kinetic energy does it have?

49.A 70kg man runs at a pace of 4 m/s and a 50g meteor travels at 2 km/s. Which has the most kinetic energy?.

50.A 5000kg truck has 400000J of kinetic energy. How fast is it moving?

51.A car traveling at 10 m/s has 200000J of kinetic energy. What is the mass of the car?





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