Momentum & Collisions
A moving object with momentum will experience a change in momentum if
What is a net force acts on it?
A compressed spring has stored potential energy. When released, the potential energy is converted into.
What is Kinetic Energy?
A rocket moves in space by this law of conservation
What is the law of conservation of linear momentum?
A moving car has kinetic energy. Suppose its speed is reduced by half, its kinetic energy
What is the factor of one-fourth
The mass of an object is doubled, but its velocity remains the same; the kinetic energy responses by
What is it doubles?
If an object’s velocity is doubled, what happens to its momentum
What is it doubled?
A ball is dropped from a height of 10m. Just before it hits the ground, the approximate velocity is
What is 14 m/s?
A system is described as open when this condition is met.
What is it has a closed boundary?
or
What is open to the environment?
A 1 kg object moving at 10 m/s collides elastically with another 1 kg object at rest. After the collision, the second object is measured to be.
A 2 kg object moving at 3 m/s collides with a 1 kg object at rest. If the collision is perfectly inelastic, what is their final velocity?
What is 2 m/s?
Why do airbags help reduce injuries in car accidents?
They increase the time of impact, reducing force
A pendulum swings back and forth. Assuming there is no air resistance, the kinetic is maximum when
What is the bottom of the swing?
What is by a factor of 9?
A pump with a power of 1000 W is used to lift water from a well 20m deep. In 5 seconds, the pump can lift
What is 25 kg?
A roller coaster reaches the top of a hill and momentarily stops before descending. This type of energy is maximized at that point.
What is gravitational potential energy?
In this type of collision conserves both kinetic energy and momentum
What is Elastic?
An object of mass 5 kg is lifted 10 m in the air, the gravitational potential energy is
What is 500 J?
A projectile is launched vertically with an initial velocity of 20 m/s. The maximum height of the projectile is
What is 20 m?
A person jumps off a boat, causing the boat to move backward. This is due to
What is the conservation of momentum?
This happens to kinetic energy in a perfectly inelastic collision
A truck and a small car collided head-on. We can say this about their force
What is both exert equal force on each other
A stretched rubber band is an example of this type of energy
What is elastic potential energy?
What is 10 Ns?
A pendulum swings from its highest to lowest position. Its total mechanical energy
What is remains constant?
What is remains constant