Gravity and acceleration

The acceleration of objects falling on Earth due to gravity is

• 9.8 m/s

• 9.8 m/s²

• 9.8 g/mL

• 9.8 g/m/m

The rate that a car's velocity changes is its

• speed

• force

• gravity

• acceleration

A negative acceleration means that your object is _____. 

• not accelerating
• not moving
• speeding up 
• slowing down 

Define acceleration due to gravity.

• The force of gravity acting on an object.

• The velocity of an object under the influence of gravity.

• The acceleration experienced by an object due to gravity.

• The force of gravity.

Acceleration is defined as the CHANGE in 

• time of motion to another place. 
• velocity 
• distance 
• speed

What is velocity?

• the quickness of an object
• the location of an object
• acceleration
• speed in a specific direction

What is the velocity of an object that has been falling freely in a vacuum for 2 seconds?

• 10 m/s down

• 10 m/s up

• 20 m/s down

• 40 m/s down

A ball drops from a tall building. The ball strikes the sidewalk 2.0 seconds later. What is the velocity of the ball when it hits the sidewalk?

• 20 m/s

• 10 m/s

• 5 m/s

• 8 m/s

What does it mean for an object to be in free fall?

• Only air resistance acting on the object.

• Gravity is the only force acting on the obejct.

• Any object that is in downward motion.

A textbook is dropped from a second floor window and falls to the ground. What happens to the acceleration as the book falls to the ground

• the acceleration increases

• the acceleration decreases

• the acceleration remains constant