Physics
Grade-7
Easy
Question
Direction : Is this an example of kinetic energy?
A person ready to dive
- Yes
- No
Hint:
No
The correct answer is: No
Standing on the top of the diving board, gives the divers some gravitational potential energy. This potential energy is converted into kinetic energy while the diver jumps off. So when a person is ready to dive he does not possess kinetic energy instead possesses potential energy.
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Direction : Is this an example of kinetic energy?
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- Yes
- No
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Kinetic energy and velocity are related as
Kinetic energy and velocity are related as
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Kinetic energy and mass are related as
Kinetic energy and mass are related as
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Identify the correct formula for calculating kinetic energy.
- KE = 2mv
Identify the correct formula for calculating kinetic energy.
PhysicsGrade-7
- KE = 2mv
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The SI unit of kinetic energy is ______.
- Kg m/s
- Kg m2/s
- Kg m2/s2
- Kg s/m
The SI unit of kinetic energy is ______.
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- Kg m/s
- Kg m2/s
- Kg m2/s2
- Kg s/m
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Kinetic energy is defined as
- The energy of a body due to its motion
- The energy of a body due to its mass
- The energy of a body due to its position
- The energy of a body due to its shape
Kinetic energy is defined as
PhysicsGrade-7
- The energy of a body due to its motion
- The energy of a body due to its mass
- The energy of a body due to its position
- The energy of a body due to its shape
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What is the new kinetic energy of a body of mass m, moving at a velocity, v, when its velocity becomes 5 v
- 5KE
KE
- 25 KE
What is the new kinetic energy of a body of mass m, moving at a velocity, v, when its velocity becomes 5 v
PhysicsGrade-7
- 5KE
KE
- 25 KE
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What is the new kinetic energy of a body of mass m, moving at a velocity, v, when its velocity becomes v/3
- 3KE
- 9KE
What is the new kinetic energy of a body of mass m, moving at a velocity, v, when its velocity becomes v/3
PhysicsGrade-7
- 3KE
- 9KE
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What is the new kinetic energy of a body of mass m, moving at a velocity, v, when its velocity becomes 3 v
- 3KE
- 9KE
What is the new kinetic energy of a body of mass m, moving at a velocity, v, when its velocity becomes 3 v
PhysicsGrade-7
- 3KE
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Which of the bodies given below has more kinetic energy when mass is constant?
A) 3 m/s
B) 6 m/s
- 3m/s
- 6m/s
- Both A and B
- None
Which of the bodies given below has more kinetic energy when mass is constant?
A) 3 m/s
B) 6 m/s
PhysicsGrade-7
- 3m/s
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Velocity is ____ proportional to the kinetic energy.
- Directly
- Inversely
- Initially directly and then inversely
- Initially inversely and then directly
Velocity is ____ proportional to the kinetic energy.
PhysicsGrade-7
- Directly
- Inversely
- Initially directly and then inversely
- Initially inversely and then directly
Physics
What can you say about the kinetic energy when both have the same mass?
A) 2 m/s
B)
m/s
- KEA ≥ KEB
What can you say about the kinetic energy when both have the same mass?
A) 2 m/s
B)
m/s
PhysicsGrade-7
- KEA ≥ KEB