Physical Science Final Review

If Bob walks 2 blocks east, 4 blocks south, and 2 blocks west, what is his displacement? 

• 2 blocks south
• 4 blocks south
• 2 blocks south, 2 blocks east
• 4 blocks south, 2 blocks east

If Bob walks 2 blocks east, 4 blocks south, and 2 blocks west, what distance has he traveled?

• 2 blocks
• 4 blocks
• 6 blocks
• 8 blocks

Which statement is true about an object in free fall? Assume negligible air resistance.

• The object has a constant velocity
• The object has a constant acceleration
• The acceleration of the object increases as it falls
• The velocity decreases at the acceleration decreases as it falls 

Which statement is true about an object in free fall? Assume negligible air resistance.

• The object has a constant velocity
• The object has a constant acceleration
• The acceleration of the object increases as it falls
• The velocity decreases at the acceleration decreases as it falls 

How much does a 125 kg object weigh on Earth?

• 784 N
• 12.76 N
• 1113 N
• 1225 N

Brakes on a car are designed to use friction to slow or stop a vehicle. Brake shoes and pads are lined with a heat-resistant material that presses against rotating disks or drums. Which type of frictional force causes a car to slow when the brakes are applied? 

• Fluid
• Rolling
• Sliding
• Static

When a driver applies brakes quickly which of the following best explains why a book on the seat keeps moving forward? 

• Gravity pushes the book forward
• There is no frictional force acting on the book
• The brakes apply a force to the car but not to the book
• The book accelerates in the direction of the applied force

If you push a book across a table, which of the following describes the reaction force? 

• The book pushes on the table
• The book pushes on you
• The table pushes on the book
• You push on the table

 A hockey stick applies a force to a puck that results in an acceleration of 3.0 m/s² . What would be the effect on the acceleration of the hockey puck if the force is tripled?

• The acceleration would be reduced to 1.0 m/s2 
• The acceleration would remain the same. 
• The acceleration would be increased to 6.0 m/s2 
• The acceleration would be increased to 9.0 m/s2 

Which material would be classified as homogeneous? 

• Stainless steel
• Granite rock
• Cookies and Cream Icecream
• Apple