Kinetic Energy
The energy of movement is called:
A) Potential
B) Kinetic
C) Elastic
Kinetic
A roller coaster is at the top of a hill. What type of energy is at its maximum?
a) Potential
b) Thermal
c) Sound
Potential
__________ is stored when something is stretched or compressed, like a rubber band or a spring.
Elastic Energy
Mechanical energy is the sum of:
a) Kinetic and potential energy
b) Work and power
c) Mass and velocity
Kinetic and potential energy
The kinetic energy of an object depends on:
Mass and velocity
The stored energy due to an object’s position is called:
Potential Energy
The elastic potential energy stored in a stretched spring depends on which variables?
The spring constant and the extension
A ball is rolling down a ramp. It is halfway between the top and the bottom of the ramp. What kind(s) of energy does it have?
Potential and kinetic
What change will increase an object’s kinetic energy the most?
What happens to the gravitational potential energy of an object if its height is tripled?
It triples
A compressed spring has stored elastic potential energy. What happens to this energy when the spring is released?
It transforms into kinetic energy
If only conservative forces act on a system, what can be said about its total mechanical energy?
It remains constant
If a moving object's velocity is doubled, what happens to its kinetic energy?
It quadruples
A 10 kg object is lifted to a height of 13 meters. How much gravitational potential energy does it have?
1274 Joules
A spring has a constant of k = 400 N/m and is compressed by 0.2 m. Find its elastic potential energy.
8 Joules
A heavy object is dropped from a vertical height of 20.0 m. What is its velocity when it hits the ground?
19,8 m/s
How fast is a 1000 kg boat travelling if it has 10 000 J of kinetic energy?
4,47 m/S
What is the mass of an object that has 500J of gravitational energy and is 10m above the ground?
5,10 kg
A spring has a elastic energy of 300 J and is stretched 3 m. Calculate its spring constant.
66,7 N/m
A 1000 kg car is resting at the top of a 40 m hill. How fast is the car moving when it gets half of the way down?
19,8 m/s