Exam 3: Force and Motion

An unbalanced force of 42 N is applied to a mass of 7.0 kg. What will be the resulting acceleration?

Which of the following would be the same for a person on the Moon rather than on Earth?

What is the purpose of having automobile air bags?

Linear momentum is the product of mass times ______________.

A 0.065-kg bullet travels with a velocity of magnitude 90 km/h. What is the bullet's linear momentum?

The quantity mvr is an object's

The buoyant force of an object is equal to the ______________ of the ______________ it displaces.

An object will ______________ in a fluid if its average density is ______________ the density of the fluid.

Calculate the centripetal force on a 3.0-kg object moving in a horizontal circular path of 20-m radius with a speed of 8.0 m/s.

Newton's third law of motion states that whenever one object exerts a force upon a second object, the second object exerts a(n) ______________ and ______________ force upon the first object.

To initiate motion, a(n) ______________ force is necessary.

For Newton's third law, the action and reaction forces are equal in ______________ and opposite in direction.

A mass is accelerated when ______________ acts upon the mass.

Which of the following would be different for a person on the Moon rather than on Earth?

An acceleration is evidence of ______________.

A stationary but movable 450-kg cannon is fired, and the 12-kg cannonball moves off to the right with a velocity of 20.0 m/s. What is the cannon's velocity (neglecting friction or any restraints)?

An apple weighs approximately one ______________.

a = F/m is a statement of ______________.

An automobile travels due north with a speed of 68 km/h and an acceleration of 1.5 m/s². All forces considered, the unbalanced force acting on the auto is

The angular momentum of a 100.0 kg object moving around a 75.0 m circle at a constant speed of 3.90 m/s is