Acceleration due Gravity

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

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

• 9.8 m/s down

• 10.1 m/s down

• 19.6 m/s down

• 39.2 m/s down

An object initially at rest falls freely near Earth's surface. How long does it take the object to attain a speed of 98 m/s?

• 0.1 s

• 10 s

• 98 s

• 960 s

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?

• 19.6 m/s²

• 9.8 m/s²

• 4.9 m/s²

• 7.8 m/s²

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.

A girl drops a 7 gram bowling ball and a 1gram rock from a cliff. Which will hit the ground first?

• Bowling Ball

• Rock

• Ignoring air resistance, both will hit at the same time.

• The cliff

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.

What will be the velocity of an object after it falls for 3 seconds?

• 80 ft/s

• 29.4 ft/s

• 0.31 ft/s

What is gravity?

• A force
• Energy
• A push
• All of them