Mechanical Energy and Work Quiz

What is the mass of the object being carried up the stairs?

• 1.5 kg

• 5 kg

• 3 kg

• 2.5 kg

What is the formula used to calculate the work done on the ball?

• Mass x Velocity

• Force x Distance

• Mass x Gravity x Height

• Force x Distance x Cosine of Theta

What is the angle between the displacement vector and the applied force when carrying the ball up the stairs?

• 45 degrees

• 90 degrees

• 0 degrees

• 180 degrees

How much work is done on the ball when it is carried up the stairs?

• 150 joules

• 250 joules

• 100 joules

• 196 joules

What happens to the potential energy of the ball as it is carried up the stairs?

• It remains constant

• It decreases

• It becomes zero

• It increases

What is the initial kinetic energy of the ball when it is held at the top of the stairs?

• 0 joules

• 50 joules

• 196 joules

• 100 joules

What happens to the potential energy of the ball as it falls?

• It is converted into kinetic energy

• It increases

• It remains constant

• It is lost as heat

What is the final kinetic energy of the ball just before it hits the ground?

• 50 joules

• 100 joules

• 0 joules

• 196 joules

What is the formula used to calculate the final velocity of the ball?

• Square root of (2 x Kinetic Energy / Mass)

• Mass x Velocity

• Mass x Gravity x Height

• Force x Distance

What is the final velocity of the ball just before it hits the ground?

• 12.5 m/s

• 10 m/s

• 15 m/s

• 8 m/s