Force, Work and Energy Quiz

Alex is pushing a box across a floor. Which of the following actions would NOT be considered "work" according to the scientific definition?

1. Alex pushes the box, but it doesn't move
2. Alex pushes the box, and it moves across the floor
3. Alex holds the box still while standing
4. Alex lifts the box and moves it to a higher shelf

Answer: (a) Alex pushes the box, but it doesn't move

You are riding a bicycle uphill. When you reach the top and stop pedaling, what happens to the energy that was used to pedal uphill?

1. The energy disappears.
2. The energy is transformed into heat.
3. The energy is stored as potential energy.
4. The energy is transferred into the tires, making them spin faster.

Answer: (c) The energy is stored as potential energy.

Identify the only correct statement.

1. Gravity is a contact force that pushes objects upward
2. Pulling a rubber band stretches it by applying force
3. Without any force, a ball can start rolling
4. Friction always helps to increase motion

Answer: (b) Pulling a rubber band stretches it by applying force

When a stone is thrown into the air, what happens to its kinetic energy as it rises higher?

1. The kinetic energy decreases as the stone gains potential energy.
2. The kinetic energy increases.
3. The kinetic energy stays constant.
4. The kinetic energy disappears as the stone stops moving.

Answer: (a) The kinetic energy decreases as the stone gains potential energy.

Which of the following is a second-class lever, where the load is between the effort and the fulcrum?

Answer: (b)

If a screw has less steep threads, what happens?

1. Easier to turn, holds less tightly
2. Harder to turn, holds better
3. Doesn’t hold at all
4. Turns freely but doesn’t fasten

Answer: (b) Harder to turn, holds better

While walking on a slippery surface, you feel yourself slipping. Which force is making you slip, and how can you stop it?

1. Friction; By applying more force to the ground
2. Gravity; By taking smaller steps
3. Air resistance; By walking faster
4. Friction; By wearing shoes that grip better

Answer: (d) Friction; By wearing shoes that grip better

Select the INCORRECT pair from below: 1. Pulley and Wedge – Speeding up the load movement 2. Inclined Plane and Pulley – Reducing the effort needed to lift 3. Lever and Screw – Decreasing the distance traveled 4. Wheel and Axle – Holding the object in one place

1. Only 1
2. Only 3 and 2
3. Only 4
4. Both 1 and 3

Answer: (d) Both 1 and 3

Which of the following scenarios demonstrates the transformation of potential energy into kinetic energy?

1. A stretched rubber band in your hand
2. A book resting on a table
3. A ball rolling down a ramp
4. A light bulb glowing brightly

Answer: (c) A ball rolling down a ramp

An illustration shows two children racing toy cars down two different ramps — one steep and one gentle. Which statement BEST explains the difference?

1. The steeper ramp gives the cars more potential energy.
2. The gentler ramp gives the cars more gravitational force.
3. The steeper ramp allows the cars to convert potential energy to kinetic energy faster.
4. The cars on both ramps have the same kinetic energy at the bottom.

Answer: (c) The steeper ramp allows the cars to convert potential energy to kinetic energy faster.