Momentum
A moving car has momentum. If it moves twice as fast, its momentum is ________________ as much.
twice
what is the conversation of momentum
the total momentum of a closed system remains constant
The higher up an object is, the higher its _________.
potentail energy
What is kinetic energy
the energy that object posses due to its motion
Which type of collisions conserve kinetic energy?
elastic
A steel ball whose mass is 2.0 kg is rolling at a rate of 2.8 m/s. What is its momentum?
5.6
what is an example of converstion of energy
A car crash
Do plants use potential energy?
no
True or false: watching TV uses kinetic energy.
false
Provide a specific example of an elastic collision.
balls hitting each other
two cars, one twice as heavy as the other, move down a hill at the same speed. Compared to the lighter car, the momentum of the heavier car is ___________________ as much.
twice
How can a racing bicycle have the same linear momentum as a pickup truck?
the velocity of the bicycle is large but its mass is small and the mass of the truck is large but its velocity is small
True or false: a ball on the ground has more potential energy than a ball on a hill
false
True or false: bowling uses kinetic energy.
true
Provide a specific example of an inelastic collision.
car crash when they stick together
marble is rolling at a velocity of 1.5 m/s with a momentum of 0.10 kg*m/s. What is its mass?
0.067
a basketball bouncing off the floor or one ball in a game of pool bouncing off another.
Define potential energy.
the energy of an object due to its position
Sam is Standing in line. Does or does he not have kinetic energy?
he does not
A 1250 kg car is moving with a velocity of 32.0 m/s when it bumps into the 875 kg car ahead of it which has a velocity of 25.0 m/s. After the collision, the cars move together. What is vf?
inelastic
Which has more momentum, a 1000 kg car moving 1 m/s or a 70 kg person sprinting at 8 m/s?
The 1000 kg car has significantly more momentum
What types of conversation of momentum
elastic, inelastic, and completely inelastic
Jeffrey is on top of a rock. Does or does he not have potential energy?
He does
Does standing have kinetic energy
Yes
A 50.0 kg woman, riding on a 10 kg cart, is moving east at 5.0 m/s. The woman jumps off the front of the cart and lands on the ground at 7.0 m/s eastward. What is the final velocity of the cart?
5.0