POWER, WORK & ENERGY

Which of these items is not part of the law of conservation of energy?

• energy cannot be created

• energy cannot be destroyed

• energy can be transferred between forms

• energy is destroyed by friction

What type of energy is in this picture?

• Kinetic
• Potential
• Chemical
• Sound

What kind of energy does this device use?

• Chemical
• Electrical
• Thermal
• Chemical

The SI Unit for Energy is

• Joule

• Newton

• Calorie

• Watt

Which situation is work not done?

• lifting a 20 pound box off the floor
• holding a 20 pound box above the floor
• sliding a 20 pound box across the floor
• sliding a 20 pound box up an inclined plane

How do you calculate power?

• P = W/t
• P = E/t
• P = w * t
• P = bbq/chicken

Gravitational potential energy depends on the ________ and ________ of the object. 

• Height and mass
• Friction and movement
• Mass and Movement
• Height and Friction 

What is mechanical energy?

• It is what metal creates when heated.
• All potential and kinetic energy in a system.
• It is motion of all matter.
• Energy of momentum.

Energy in the form of motion.

• mechanical energy

• potential energy

• kinetic energy

• momentum

The SI unit for power is...?

• Watts

• Joules

• Newtons

• Metres