EmSAT EmSAT Physics

Question 1

What is Newton's second law of motion?

Accepted Answer

F = ma

Answer

Newton's second law states that force equals mass times acceleration: F = ma. It describes how the motion of an object changes when a net force acts on it.

Question 2

A car travels 120 km in 2 hours. What is its average speed?

Accepted Answer

60 km/h

Answer

Average speed = distance ÷ time = 120 km ÷ 2 h = 60 km/h.

Question 3

What is the unit of force in the SI system?

Accepted Answer

Newton

Answer

The SI unit of force is the Newton (N), defined as the force needed to accelerate a 1 kg mass at 1 m/s². It is named after Isaac Newton.

Question 4

An object is in free fall. What is its acceleration? (ignore air resistance)

Accepted Answer

9.8 m/s²

Answer

On Earth, the acceleration due to gravity is approximately 9.8 m/s² downward. All objects in free fall (ignoring air resistance) accelerate at this rate.

Question 5

What does the area under a velocity-time graph represent?

Accepted Answer

Distance

Answer

The area under a velocity-time graph represents the displacement (distance traveled). This is derived from the relationship: distance = velocity × time.

EmSAT Practice Test

EmSAT Practice Test

EmSAT EmSAT Physics