Latihan Fizik 5Abk/5Izz/5Hish

Which of the following is a unit for a derived quantity?

• Watt, W
• Meter, m
• Ampere, A
• Kilogram, kg

Diagram 1 shows a micrometer screw gauge used to measure the thickness of 100 pieces of paper. What is the thickness of one piece of paper in mm?

• 0.0432

• 0.0438

• 0.0482

• 0.0488

Diagram 2 shows a boy standing on the platform of a train station watching a train. The train starts from rest and moves with an acceleration of 0.2 ms–2. The boy observes . What is the length of the train? that the train takes 24 s to move past him.

• 48.0 m

• 57.6 m

• 115.2 m

• 120.0 m

Diagram 3 shows a pillion rider moving backwards when the motorcycle accelerates. The backwards movement of the pillion rider can be explained by

• the concept of inertia

• the concept of equilibrium of forces

• principle of conservation of momentum

• principle of conservation of energy

Diagram 4 shows trolley P of mass 1.1 kg moving to the right with a velocity of 15 m s-1. It collides head-on with a trolley Q of mass 1.0 kg which is initially at rest. The two What is the velocity of the trolleys after the collision? trolleys stuck together after the collision.

• 4.12 m s-1

• 5.93 m s-1

• 6.14 m s-1

• 7.86 m s-1

A ball of mass 0.5 kg is being kicked by a force of 10 N. If the force is exerted in 0.2 s, what is the impulse experienced by the ball?

• 2.0 N s
• 10.2 N s
• 30.0 N s
• 50.0 N s

Why are the front and rear sections of a car designed to crumple easily?

• To decrease impulse

• To decrease momentum

• To increase friction

• To increase impact time

Diagram 5 shows a stroboscopic photograph of a ball falling towards the ground. Which statement describes the motion of the ball?

• It falls with constant velocity

• It falls with decreasing velocity

• It falls with constant acceleration

• It falls with increasing acceleration

Diagram 6 shows the horizontal forces acting on the motorcycle when it is accelerating. Which relationship is correct?

• R + F = G

• R + G > F

• R + G < F

• R + G = F

Diagram 7 shows a horse is pulling a rope to lift a load of 40 kg through a vertical height of 4 m in 5 s. What is the power of the horse to lift the box?

• 50 W

• 320 W

• 500 W

• 800 W