Math Problems
There is a bell at the top of a tower that is 45m high. The bell weighs 190N. The bell has _______ energy. Calculate it.
8550J
What is the potential energy of a 3kg ball that is on the ground?
0J
The energy of matter at rest.
potential energy
How does Newton describe force?
The potential energy of an apple is 6.0J. The apple is 3m high, what is the mass of the apple.
0.2kg
What is the kinetic energy of a ball that is rolling at 2m/s?
6J
Any interaction that will change the speed of an object unopposed.
force
Inertia
an objects resistance to changes in motion, related to mass and friction
What is the velocity of a 500g elevator that has 4000J of energy.
4m/s
A 10kg mass is lifted to a height of 2m. What is the potential energy at this position?
196J
Occurs when a solid object moves through a fluid.
fluid energy
What is the mass of an object that creates 33,750J of energy by traveling at 30m/s?
75kg
A roller coaster is at the top of a 72m hill and weighs 966N. At the top of the hill the roller coaster has ______ energy. Calculate it.
681,609.6J
Combination of all forces acting on an object.
net force
there is an equal and opposite reaction
A 75kg refrigerator is located on the 70th floor of a skyscraper (300m above the ground). What is the potential energy of the refrigerator?
220,500J
A baby carriage is rolling down a hill at 18m/s. If the carriage has 90J of kinetic energy, what is the mass of the carriage?
0.56kg
A force that is a push, pull, or friction between an object and the ground.
contact force
Acceleration may include a change in_______.
speed, direction, or both speed and direction