SBUR SCI7 QE3 SY2024-25

Which of the following statements best describes a scalar quantity?

• It has both magnitude and direction.

• It is fully described by its magnitude alone.

• It can only be measured in standard units.

• It requires a reference point for its measurement.

A box is pushed with a force of 10 N to the east and then pulled with a force of 5 N to the west. What is the net force acting on the box?

• 5 N to the east

• 5 N to the west

• 15 N to the east

• 15 N to the west

Which of the following is an example of a non-contact force?

• Friction

• Tension

• Gravitational force

• Applied force

If two forces of 10 N and 15 N act on an object in the same direction, what is the resulting net force?

• 5 N

• 10 N

• 15 N

• 25 N

An object is at rest and experiences balanced forces. What can be inferred about its state of motion?

• It will start moving in the direction of the larger force.

• It will remain at rest.

• It will accelerate in the direction of the net force.

• It will move with constant velocity.

A person walks 4 m east, then 3 m west. What is their total distance traveled?

• 1 m east

• 7 m

• 3 m west

• 4 m east

If a car travels 100 km north in 2 hours, what is its average velocity?

• 50 km/h north

• 100 km/h north

• 200 km/h north

• 50 km/h

Which of the following correctly distinguishes between speed and velocity?

• Speed is a vector; velocity is a scalar.

• Speed includes direction; velocity does not.

• Speed is the rate of distance; velocity is the rate of displacement.

• Speed can change direction while velocity cannot.

An object is dropped from a height and falls under the influence of gravity. What type of energy is primarily involved just before it hits the ground?

• Potential energy

• Kinetic energy

• Thermal energy

• Chemical energy

According to the Law of Conservation of Energy, what happens to energy in a closed system?

• It can be created or destroyed.

• It can only be transformed from one form to another.

• It remains constant only if no work is done.

• It decreases over time.