Midterm Physics

A shopping cart given an initial velocity of 2.0 m/s undergoes a constant acceleration of 3.0 m/s². What is the magnitude of the cart's displacement after the first 4.0 s of its motion?

• 10.0 m

• 55 m

• 32 m

• 80.0 m

What causes a moving object to change direction?

• acceleration

• velocity

• inertia

• force

Which of the following units is the SI unit of velocity?

• meter

• second per meter

• meter per second

• meter•second

Which of the following is the cause of an acceleration or a change in an object’s motion?

• speed

• inertia

• force

• velocity

Which of the following forces exists between objects even in the absence of direct physical contact?

• frictional force

• fundamental force

• contact force

• field force

Which of the following is the tendency of an object to maintain its state of motion?

• acceleration

• inertia

• force

• velocity

An object with a mass of 3.0 kg has a force of 9.0 newtons applied to it. What is the resulting acceleration of the object?

• 2 m/s²

• 3 m/s²

• 1 m/s²

• 6 m/s²

When there is no air resistance, objects of different masses

• fall with equal accelerations with similar displacements.

• fall with different accelerations with different displacements.

• fall with equal accelerations with different displacements.

• fall with different accelerations with similar displacements.

An object in free fall

• a. undergoes a velocity decrease of 9.81 m/s during each second.

• b. experiences an increase in speed of 9.81 m/s during each second.

• c. all of the above

• d. moves only downward.

The magnitude of the force of gravity acting on an object is

• frictional force.

• weight.

• inertia.

• mass.