Question Paper 1-Physics

The base unit of energy can be written as …

• kg.m.s^-1 .

• kg.m.s^-2

• kg.m2 .s^-2

• N.s.

A wooden block is pulled up a rough, inclined surface using a rope. The wooden block moves at a constant velocity.

This means that:

• There are no forces acting on the block.

• There are no vertical forces acting on the block

• Only gravitational force acts on the block.

• The vector sum of all forces acting on the block is equal to zero

Which of the following situations is an example of uniform acceleration?

• An astronaut experiences weightlessness while he is in space.

• A feather drops to the ground inside a vacuum.

• A wooden box slides down a smooth surface at a constant velocity.

• A leaf falls to the ground on a windy day.

• 2¼ F

A rubber ball is thrown vertically downwards from the top of the building which is P m above the ground. The ball bounces off the ground and reaches a height of ½ P m above the ground. Ignore the effect of air friction and contact time between the ball and the ground. Which ONE of the following position-time graphs is CORRECT for the motion of the ball described above?

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• 
• 
• 

A simple pendulum is set up by hanging a metal ball from a thin string as shown in the diagram below. The pendulum swings from point A and then past point B and passes point C. Ignore the effect of air friction.

Which ONE of the following statements is TRUE for this pendulum?

• The gravitational potential energy at A and C is the same.

• The pendulum comes to rest at point C where its gravitational potential energy is a maximum.

• The total mechanical energy of the ball is the same at B and C.

• The velocity of the pendulum is a maximum at B and a minimum at C

A truck moves at a velocity of x m.s-1 . The mass of the truck is m. A container, mass ½ m is dropped vertically onto the truck. The velocity of the truck changes to ⅔ x. The kinetic energy of the truck has changed by a fraction of …

Three spheres with charges are placed as follows in space. The distance between the X and Y is equal to the distance between Y and Z. Which of the charges will experience a net force to the right?

• Sphere X and Y

• Sphere X

• Sphere Y

• Sphere Z

A container of mass 60 kg is placed on an inclined surface which makes an angle of 15° with the horizontal. A force F = 120 N is applied to the container as shown in the diagram below. The container accelerates down the inclined surface. The coefficient of kinetic friction (μk) between the container and the surface of the inclined surface is 0,75.

State Newtons First Law of Motion.

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A bucket is at rest on a table. Which ONE of the following is the reaction force to the weight of the bucket, as described by Newton's Third Law?

• Force of the table on Earth

• Force of the bucket on Earth

• Force of the bucket on the table

• Force of the table on the bucket