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Ninth Grade (Grade 9) Energy and Momentum Questions

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Grade 9 Energy and Momentum
The momentum after a collision of two objects is explained using the
  1. law of inertia.
  2. law of momentum.
  3. law of acceleration.
  4. law of conservation of momentum.
Grade 9 Energy and Momentum
What is the unit used for momentum?
  1. kg*m/s
  2. kg*s/m
  3. ml*m/s
  4. ml*s/m
Grade 9 Energy and Momentum
What is the formula for momentum?
  1. f=ma
  2. w=ma
  3. p=mv
  4. v=pm
Grade 9 Energy and Momentum

This question is a part of a group with common instructions. View group »

What best describes the type of energy provided by the rubber band as it is stretched?
  1. Gravitational Potential Energy
  2. Kinetic Energy
  3. Thermal Energy
  4. Elastic Potential Energy
Grade 9 Energy and Momentum
A small motor does 4000J of work in 20 seconds. What is the power of the motor in watts?
  1. 0.005 Watts
  2. 80,000 Watts
  3. 200 Watts
  4. None of the Above
Grade 9 Energy and Momentum
What causes mechanical energy to change to thermal energy?
  1. air resistance and friction
  2. friction and conservation
  3. conservation and air resistance
  4. energy and friction
Grade 9 Energy and Momentum
Imagine an object held at some height above the ground. It is released and falls toward the ground. Ignoring air resistance or friction, which of the following must be true?
  1. Before it falls, all of its energy must be potential energy.
  2. At the end of its fall, all of its energy must be converted to kinetic energy.
  3. During its fall, the combination of its kinetic and potential energy must equal the amount of potential energy with which it started.
  4. All of the above are true?
Grade 9 Energy and Momentum
Which of the following is not used to calculate kinetic energy?
  1. mass
  2. weight
  3. height
  4. speed
Grade 9 Energy and Momentum
What is the formula for gravitational potential energy?
  1. gpe=mdh
  2. gpe=mvp
  3. gpe=mgh
  4. gpe=mgp
Grade 9 Energy and Momentum
The letters in the momentum formula represent what?
  1. motion, movement and velocity
  2. mass, momentum and velocity
  3. mass, velocity and acceleration
  4. mass, velocity and weight
Grade 9 Energy and Momentum
Energy stored due to an object's ability to return to its original shape after being deformed is
  1. kinetic energy.
  2. gravitational potential energy.
  3. elastic potential energy.
  4. chemical potential energy.
Grade 9 Energy and Momentum
Which of the following is not used to calculate potential energy?
  1. mass
  2. height
  3. gravitational acceleration
  4. speed
Grade 9 Energy and Momentum
Which of the following is NOT measured in joules?
  1. Work
  2. Energy
  3. Power
  4. None of the Above
Grade 9 Energy and Momentum
Which of the following is NOT an example of kinetic energy being converted to potential energy?
  1. a basketball player jumping for a rebound
  2. releasing a compressed spring
  3. squeezing a rubber ball
  4. pulling a sled up a hill
Grade 9 Energy and Momentum
When a pitcher tosses a baseball, which of the following is true?
  1. When the ball leaves his hand, he is no longer doing work on it.
  2. He is doing work on the ball until it stops or changes direction.
  3. He never does any work on the ball.
  4. Work is being done after the ball leaves his hand, but not before.
Grade 9 Energy and Momentum
A moving bike has what type of energy?
Grade 9 Energy and Momentum
How are energy and work related?
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