Farhan toy truck haas a mass of 6 kg. If he pushes it with a force of 10 N, a distance of 4 m, how much work has he done on the truck?
W = fs = (10)(4) = 40 J
Energy in motion.
kinetic energy
What is the equivalent unit of one joule of work?
1 Nm
TRUE or FALSE. Energy can be destroyed.
FALSE
True or false: the law of conservation of energy states that potential energy can be completely converted to kinetic energy.
True
What is the formula for power?
P = W/t
What is the unit of work?
Joule
A diver climbs a 6 m ladder to reach a diving board. As she climbs to the board, which type of energy is increased?
gravitational potential
List the two types of energy.
Potential and kinetic energy
If it takes 20 N to move an object 2 meters, how much work has been done?
40 J
A rock sitting at the edge of a cliff. It is potential energy. TRUE or FALSE.
TRUE
What two factors must be present for work to be done upon an object
force and moving distance
If the work done increase, the the power is .........
increases
A car is sitting on a hill 20 m high. Find the mass of the car if it contains 352800 J of potential energy.
1800 kg
It is the energy due to its position and condition. Also known as the stored energy.
potential energy
TRUE or FALSE. If an object reaches a higher height, it will gain more potential energy.
TRUE
TRUE or FALSE. Force has no effect on work.
FALSE
Which pair of quantities can be expressed using the same unit? A. acceleration-velocity; B. work-energy; C. power-displacement; D. weight-potential energy
B. work-energy
What is being transferred as you do work?
energy
The law of conservation of energy states ..........
energy cannot be created or destroyed
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