Physical Science 1st Semester Test

Front

What is acceleration?

Back

Acceleration is the rate of change of velocity of an object. It occurs when an object speeds up, slows down, or changes direction.

Front

What direction is acceleration in relation to net force?

Back

The acceleration of an object is in the same direction as the net force acting on it.

Front

What is the formula to calculate speed?

Back

Speed = Distance / Time.

Front

How do you calculate the time it takes for sound to travel a certain distance?

Back

Time = Distance / Speed. For example, if sound travels at 330 m/s, to find the time for 1,485 m: Time = 1,485 m / 330 m/s = 4.5 s.

Front

What is the SI unit of force?

Back

The SI unit of force is the Newton (N).

Front

What is the relationship between force, mass, and acceleration?

Back

According to Newton's 2nd law of motion, Force = Mass x Acceleration (F = ma).

Front

What is the 1st law of motion?

Back

An object at rest stays at rest, and an object in motion stays in motion at a constant velocity unless acted upon by a net external force.

Front

What is the 2nd law of motion?

Back

The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.

Front

What is the 3rd law of motion?

Back

For every action, there is an equal and opposite reaction.

Front

What is the significance of powers of ten in SI units?

Back

SI units are based on powers of ten, which allows for easy conversion and scaling of measurements.