Unit 3 Remediation: Forces and Newton's Laws

Front

What is the normal force?

Back

The normal force is the force exerted by a surface to support the weight of an object resting on it, acting perpendicular to the surface.

Front

When is the normal force equal to the weight of an object?

Back

The normal force is equal to the weight of an object when the object is on a flat, horizontal surface with no vertical acceleration.

Front

What happens to the normal force on an inclined plane?

Back

On an inclined plane, the normal force is less than the weight of the object due to the angle of the incline.

Front

What is tension in a rope?

Back

Tension is the force transmitted through a rope, string, or cable when it is pulled tight by forces acting from opposite ends.

Front

How do you calculate the tension in an Atwood machine?

Back

To calculate the tension, use the formula: T = (m1 * g * m2) / (m1 + m2), where m1 and m2 are the masses and g is the acceleration due to gravity.

Front

What does it mean if a car is moving at a constant velocity?

Back

If a car is moving at a constant velocity, the net force acting on it is zero, meaning all forces are balanced.

Front

What is Newton's Second Law of Motion?

Back

Newton's Second Law states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass, expressed as F = ma.

Front

How do you calculate acceleration using Newton's Second Law?

Back

Acceleration can be calculated using the formula: a = F/m, where F is the net force and m is the mass of the object.

Front

What is Newton's Third Law of Motion?

Back

Newton's Third Law states that for every action, there is an equal and opposite reaction.

Front

If object A exerts a force on object B, what does object B do?

Back

Object B exerts an equal force in the opposite direction on object A.