HW: Newton's Second Law

A hockey puck is sliding across a frictionless ice surface. If no external forces are applied to it, what will happen to the puck?

• It will gradually slow down and stop.

• It will change its direction of motion.

• It will continue to move at a constant velocity.

• It will accelerate in the direction it was already moving.

What is the direct consequence of a non-zero net force acting on an object?

• The object will stop moving.

• The object will accelerate.

• The object's mass will change.

• The object will move at a constant speed.

If a larger net force is applied to an object, how does its acceleration compare to when a smaller net force is applied, assuming the object's mass remains constant?

• The acceleration will be smaller.

• The acceleration will be larger.

• The acceleration will remain the same.

• The acceleration will be in the opposite direction.

When a non-zero net force acts on an object, in what direction does the object accelerate?

• In the opposite direction of its current velocity.

• Perpendicular to the direction of the net force.

• In the same direction as the net force.

• It depends on the object's initial velocity.

When a non-zero net force is applied to an object, how does its mass relate to its acceleration?

• Directly proportional

• Inversely proportional

• No relationship

• Exponentially related

Which of the following equations correctly represents Newton's Second Law?

• F = ma

• a = ΣF / m

• F = mv

• a = v/t

Newton's First Law, which states that an object maintains its state of motion unless acted upon by an unbalanced force, is a special case of Newton's Second Law. Under what condition does this occur?

• When the object's mass is zero.

• When the net force acting on the object is zero.

• When the object's velocity is constant.

• When the object is at rest.

A person is lifting a dumbbell upwards with increasing velocity. How does the upward force applied by the person's hand compare to the downward gravitational force on the dumbbell?

• The hand force is less than the gravitational force.

• The hand force is equal to the gravitational force.

• The hand force is greater than the gravitational force.

• The hand force is unrelated to the gravitational force.