Physics Unit 3 Review

Front

Why should you reduce speed around a turn if the road is icy?

Back

Because your car will travel in a straight line unless forced to do otherwise, because the ice reduces the frictional force between the tires and the road, and because a minimum amount of centripetal force is required to keep your car moving around the curve.

Front

What is the coefficient of friction if a box with a weight of 35 N experiences a force of friction of 5 N?

Back

0.14

Front

What is the force that acts perpendicular to the surface?

Back

Normal force.

Front

What does vector A represent in a physics problem involving acceleration?

Back

Vector A represents the acceleration of the ball.

Front

What is the net force acting on a 5 kg mass accelerated to 3 m/s²?

Back

15 N.

Front

Define friction.

Back

Friction is the force that opposes the relative motion of two surfaces in contact.

Front

What is centripetal force?

Back

Centripetal force is the force required to keep an object moving in a circular path, directed towards the center of the circle.

Front

Explain the concept of normal force.

Back

Normal force is the support force exerted upon an object that is in contact with another stable object, acting perpendicular to the surface.

Front

What is the formula for calculating net force?

Back

Net force = mass × acceleration (F = ma).

Front

What is the relationship between mass and weight?

Back

Weight is the force of gravity acting on an object, calculated as weight = mass × gravitational acceleration (W = mg).