Physics Form 4 Chapter 2 Forces and Motion

Puan Halimah pushes her trolley from P to U via Q, R, S, T and U as shown in Diagram. Find her displacement from P.

• 10 m

• 17 m

• 23 m

• 77 m

Cars P and Q start from rest simultaneously and accelerates at acceleration a and 3 ms^–2 respectively. After 2 seconds, P is ahead of Q by 6 m. Find a.

• 4.5 ms^–2

• 5.0 ms^–2

• 5.5 ms^–2

• 6.0 ms^–2

Graphs X and Y are the velocity-time graphs for car V and car W respectively. Which of the following areas represents the distance between the two cars at time t' ?

• OPQ

• OQR

• OPQR

• OPR

Which features of a graph is used to determine acceleration?

• The slope of a displacement–time graph

• The slope of a velocity–time graph

• The area under a displacement–time graph

• The area under a velocity–time graph

A body stays at rest, or continues to move with a constant velocity, unless an external force acts on it. Which of the Newton’s laws is related to the above statement?

• Newton’s first law of motion

• Newton’s second law of motion

• Newton’s third law of motion

A loaded ocean tanker is more difficult to stop than an empty one because it

• possesses more kinetic energy

• sinks more into the water

• possesses more inertia

• encounters a smaller frictional force

A golfer swings a club to hit a golf ball. The club continues to swing while the golf ball flies off with a high velocity . Which of the following quantities is conserved?

• Kinetic energy

• Potential energy

• Momentum

• Impulse

Diagram 4 shows two trolleys P (mass = 2 kg) and Q (mass = 1 kg) placed together.P and Q move in opposite directions when the release pin is struck. Which of the following statements is correct?

• Kinetic energy of P = Kinetic energy of Q

• Momentum of P= 1/2 × Momentum of Q

• Speed of P = 1/2 x the speed of Q

• Velocity of P = 2 times velocity of Q

The graph in Diagram shows the velocity-time graph of a car. Which part of the graph indicates that the resultant force on the car is zero?

• PQ

• QR

• RS

• ST

A force of 9N pushes an object of mass 3 kg on a floor. If the object moves at a uniform velocity of 2 ms^–1, what is the magnitude of the friction, in N?

• 1 / 3

• 3

• 6

• 9