Work Power & Energies

The transfer of energy from one object to another.

• force

• power

• work

• kinetic energy

How fast energy is transferred or used.

• power

• force

• kinetic energy

• work

In order for work to be done

• objects must remain at a constant speed in a straight line

• objects must accelerate

• power must not be lost

• the object must move in same direction as force

As a bowling ball rolls down the lane it demonstrates

• kinetic energy

• potential energy

• thermal conservation

• rotational torque

John lifts a 10 kg box 1 meter and then carries it 20 meters across the room. How much work has he done?

• 10 J

• 210 J

• 98 J

• 2058 J

When an object is dropped, is work being done?

• yes, because gravity is exerting a force on it

• no, because no person is exerting a force on it

• yes, because there is no air friction

• no, because force and direction have to be parallel

A book sitting on a table is demonstrating

• kinetic energy

• kinetic friction (sliding friction)

• Newton's 3rd Law of Motion

• gravitational potential energy

Which object has the greatest Kinetic Energy?

• 2 kg rock traveling at 1 m/s

• 3 kg wagon traveling at 1 m/s

• 1 kg cannon ball traveling at 1 m/s

• 2.5 kg gallon of water sliding at 1 m/s

Tags

NGSS.MS-PS3-1

Which object has the greatest Kinetic Energy?

• 1 kg ball traveling at 2 m/s

• 1 kg ball traveling at 3 m/s

• 1 kg ball traveling at 1 m/s

• 1 kg ball traveling at 4 m/s

An object's potential energy depends on its mass, the Earth's gravity and

• speed

• size

• density

• height above the ground