Physics Quiz on Energy and Motion

What is the center of gravity of a uniform object?

• At the top
• At the bottom
• At its center
• At the edge

Which method can be used to find the center of gravity of an irregular object?

• Using a ruler
• Using a plumbline
• Using a scale
• Using a compass

What is the formula for calculating work done?

• W = F × d
• W = F + d
• W = F / d
• W = F - d

If a force is applied at an angle to the direction of motion, how is work calculated?

• W = F × d
• W = F cos(θ) × d
• W = F sin(θ) × d
• W = F / d

What is kinetic energy dependent on?

• Mass and height
• Mass and velocity
• Height and velocity
• Force and distance

How is gravitational potential energy calculated?

• Ep = mgh
• Ep = mv²
• Ep = Fd
• Ep = ½mv²

What does the principle of conservation of energy state?

• Energy can be created
• Energy can be destroyed
• Energy can be transferred
• Energy cannot be created or destroyed

In the example of a ball thrown into the air, what happens to its kinetic energy as it rises?

• It increases
• It decreases
• It remains constant
• It becomes potential energy

What is power defined as?

• Energy transferred per unit time
• Work done per unit distance
• Force per unit area
• Mass per unit volume

If 163800 J of energy is required to boil water, how long will it take for a kettle with a power of 1200 W to do so?

• 136.5 s
• 120 s
• 150 s
• 100 s