- 492.0 N
- 482.7 N
- 300.0 N
2. An object is falling in a vacuum. Which of the following quantities of the object does not change?
- Momentum
- Acceleration
- Velocity
3. A stone is thrown vertically upwards from a ground with an initial velocity of 15 ms-1. If air resistance can be neglected, find the time taken for the ball to reach to the maximum height
Answer: 1.5s
4. The diagram shows a man standing on a balance inside a lift. If the mass of the man (with his bag and umbrella) is 75kg, find the reading of the balance when the lift is moving downward at a deceleration of 8ms-2.
Answer: 1350N
5. The diagram shows a man standing on a balance inside a lift. If the mass of the man (with his bag and umbrella) is 75kg, find the reading of the balance when the lift is moving upward at a deceleration of 2 ms-2.
Answer: 600N
6. The figure below shows two vectors, P and Q are acting on an object, O. A student would like to determine the resultant vector of P and Q. Among the diagrams below, which one shows the correct drawing of the addition of the vectors?
A.
7. Diagram below shows 2 forces at right angle. Find the magnitude of the resultant force produced by the 2 forces.
- 7 N
- 17 N
- 13 N
8. Three forces are acting on a wooden block as shown bwlow. What is the magnitude of the resultant force?
- 13 N
- 12 N
- 10 N
- 15 N
9. Figure below shows a block of mass 2 kg pulled by a 30N force at an angle 60° from the horizontal. If the friction between the block and the table is 5N, what is the net force acting on the block?
- 5 N
- 15 N
- 10 N
- 20 N
10. Figure below shows a block of mass 2 kg pulled by a force F at an angle 60° from the horizontal. The friction between the block and the table is 5N. Find the magnitude of F if the block is moving at a uniform velocity 2 ms-2.
- 18 N
- 4 N
- 9 N
- 13 N
