Project 2 Review

You toss a ball to a friend with a slight upward angle. On its way up, the acceleration of the ball is ___.

• upward

• upward, at an angle

• downward

• downward, at an angle

Velocity in the ___ direction is constant for projectiles.

• vertical

• horizontal

The horizontal and vertical motions are tied together by ___.

• time

• acceleration

• velocity

• distance

A particle travels to the right at a constant rate of 3 m/s. It suddenly is given a vertical acceleration of 2 m/s2 for 2 s. What is the speed at this time?

• 4 m/s

• 3 m/s

• 7 m/s

• 5 m/s

Four forces act on an object.

If the object is accelerating to the right, compare the forces.

• F₄ = F₃, F₁ < F₂

• F₄ = F₃, F₁ > F₂

• F₄ < F₃, F₁ = F₂

• F₄ > F₃, F₁ = F₂

Four forces act on an object.

If the object is accelerating to the left, compare the forces.

• F₄ = F₃, F₁ < F₂

• F₄ = F₃, F₁ > F₂

• F₄ < F₃, F₁ = F₂

• F₄ > F₃, F₁ = F₂

Four forces act on an object.

If the object is accelerating upward, compare the forces.

• F₄ = F₃, F₁ < F₂

• F₄ = F₃, F₁ > F₂

• F₄ < F₃, F₁ = F₂

• F₄ > F₃, F₁ = F₂

Four forces act on an object.

If the object is accelerating downward, compare the forces.

• F₄ = F₃, F₁ < F₂

• F₄ = F₃, F₁ > F₂

• F₄ < F₃, F₁ = F₂

• F₄ > F₃, F₁ = F₂

When a 100 N bag of nails hangs motionless from 5 vertical strands of rope, how much tension is exerted in each strand?

• 100 N

• 20 N

• 500 N

• 50 N

A 450 kg bear grasping a vertical tree slides down at constant velocity. The acceleration of gravity is 10 m/s². What is the friction force that acts on the bear?

• 4500 N

• 450 N

• 45 N

• 460 N