Phy F4 FORCES & MOTION(III)

Diagram I shows a wooden block of weight W being pulled by a horizontal force, F and a tension, T. Which statement is correct ?

• T + F + W > 0

• T + F + W < 0

• T + F + W = 0

• T = F = W

Which object possess the least inertia?

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Diagram 2 shows a load being lifted from P to Q in a distance of 2 m. The load is then released to fall until it reaches the ground at R. What is the displacement of the load?

• 2 m upwards

• 5 m downwards

• 7 m downwards

• 11 m downwards

Diagram 3 shows two trolleys, M and N of the same mass before and after a collision. Given the initial velocity, u is 2 ms^-1. What is the final velocity?

• 1 ms^-1

• 2 ms^-1

• 4 ms^-1

• 8 ms^-1

Diagram 4 shows a man pulling a sledge with a rope. Which method will move the sledge forward with maximum acceleration?

• Small angle ; Big force

• Big angle ; Small force

• Small angle ; Small force

• Big angle ; Big force

Diagram 5 shows a velocity-time graph for a lorry with a heavy load. What is the velocity of the load right after the brake of the lorry is suddenly applied at t=6 s?

• 0 ms^-1

• 3 ms^-1

• 5 ms^-1

• 6 ms^-1

Diagram 6 shows a coconut falling from a tree. What is the correct description of the acceleration of the coconut?

• Remains unchanged

• Increase linearly

• Decrease linearly

• Zero

Diagram 7 shows a ticker tape obtained from an experiment to study the movement of a trolley. Which statement describes the movement correctly?

• The trolley is moving with a uniform velocity

• The trolley is moving at a constant speed

• The trolley is moving with a positive acceleration

• The trolley posses a positive deceleration

Which graph shows that a is inversely proportional to m?

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Diagram 8 shows a rocket is launching with exhaust gases escape at high velocity. This situation is explained by

• impulsive force

• gravitational force

• intertia

• Newton's third law