Physics
Grade-7
Easy
Question
Which one of the two bodies shown below has less kinetic energy when both have the same speed?
- 5 kg
- 20 kg
- Both
- None
Hint:
5 kg
The correct answer is: 5 kg
Kinetic energy is directly proportional to the mass of the object and the square of its velocity.
Hence, if velocity remains constant the kinetic energy will be less for the object which has less mass.
Related Questions to study
Physics
Which one of the two bodies shown below has more kinetic energy when both have the same speed?
Which one of the two bodies shown below has more kinetic energy when both have the same speed?
PhysicsGrade-7
Physics
Which of the following statements is correct for the graph between kinetic energy and mass of the body?
Which of the following statements is correct for the graph between kinetic energy and mass of the body?
PhysicsGrade-7
Physics
What kind of graph is the graph between kinetic energy and mass of the body?
What kind of graph is the graph between kinetic energy and mass of the body?
PhysicsGrade-7
Physics
As mass decreases, kinetic energy
As mass decreases, kinetic energy
PhysicsGrade-7
Physics
As mass increases, kinetic energy
As mass increases, kinetic energy
PhysicsGrade-7
Physics
Identify the correct relation
Identify the correct relation
PhysicsGrade-7
Physics
A body of mass 100 Kg moves with a kinetic energy of 2000 J. What will be its new kinetic energy if it moves at a speed of 50 m/s?
A body of mass 100 Kg moves with a kinetic energy of 2000 J. What will be its new kinetic energy if it moves at a speed of 50 m/s?
PhysicsGrade-7
Physics
A car is traveling with a velocity of 40 m/s and has a mass of 1120 Kg. How much kinetic energy does the car have?
A car is traveling with a velocity of 40 m/s and has a mass of 1120 Kg. How much kinetic energy does the car have?
PhysicsGrade-7
Physics
A baby carriage is sitting at the top of a hill that is 21 m high. The carriage with the baby weighs 12 N. The carriage comes down with a speed of 5 m/s. What is the kinetic energy of the carriage?
A baby carriage is sitting at the top of a hill that is 21 m high. The carriage with the baby weighs 12 N. The carriage comes down with a speed of 5 m/s. What is the kinetic energy of the carriage?
PhysicsGrade-7
Physics
Hari serves a volleyball with a mass of 2.1 Kg. The ball leaves his hand at a speed of 30 m/s. How much kinetic energy does the ball have?
Hari serves a volleyball with a mass of 2.1 Kg. The ball leaves his hand at a speed of 30 m/s. How much kinetic energy does the ball have?
PhysicsGrade-7
Physics
Direction : Calculate the missing term
m = 12 Kg
v = 20 m/s
K.E. = ?
Direction : Calculate the missing term
m = 12 Kg
v = 20 m/s
K.E. = ?
PhysicsGrade-7
Physics
Direction : Calculate the missing term
m = 12 kg
v = ?
K.E. = 240 J
Direction : Calculate the missing term
m = 12 kg
v = ?
K.E. = 240 J
PhysicsGrade-7
Physics
Direction : Calculate the missing term
m = ?
v = 30 m/s
K.E. = 270 J
Direction : Calculate the missing term
m = ?
v = 30 m/s
K.E. = 270 J
PhysicsGrade-7
Physics
Direction : Calculate the missing term
m = 100 gm
v = 2 m/s
K.E. = ?
Direction : Calculate the missing term
m = 100 gm
v = 2 m/s
K.E. = ?
PhysicsGrade-7
Physics
Identify the odd one out.
Identify the odd one out.
PhysicsGrade-7
