Unit 2 -Test Review

Front

What happens to the acceleration of an object if its mass doubles while the force applied remains constant?

Back

The acceleration halves.

Front

What will happen to a car's speed if it is coasting at 60 km/hr and the brakes are applied until it slows to 40 km/hr, then the brakes are released?

Back

The car will continue moving at 40 km/hr.

Front

Is a force required to change the direction of a moving object?

Back

Yes, a force is needed to change the direction.

Front

If a car accelerates from rest at a rate of 3 m/s², what will its velocity be after 4 seconds?

Back

12 m/s.

Front

What is a newton?

Back

The SI unit for force, used to calculate acceleration and mass.

Front

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

Back

Force = Mass x Acceleration (F = ma).

Front

What is inertia?

Back

The tendency of an object to resist changes in its state of motion.

Front

What is the effect of unbalanced forces on an object?

Back

Unbalanced forces cause an object to accelerate.

Front

What is the formula for calculating acceleration?

Back

Acceleration = (Final Velocity - Initial Velocity) / Time.

Front

What is the difference between speed and velocity?

Back

Speed is scalar (magnitude only), while velocity is vector (magnitude and direction).