projectile motion

Acceleration can be defined as the rate at which an object changes its position.

• True

• False

The mass of a bowling ball on the moon is the same as the mass of a bowling ball on Earth.

• True

• False

Two objects are released from the same height. Object A falls straight down from the cliff and object B follows a curved parabolic path. It is true that:

• A hits the ground before B

• B hits the ground before A

• A hits the ground first only if it is heavier than B

• A and B hit the ground at the same time.

Ahmed kicks a ball from the top of the cliff with a horizontal velocity of 6.0 m/s. It reaches the ground after 3.5 seconds how far from the bottom of the cliff does the ball hit the ground?

• 12

• 2.5

• 21

• 1.7

If an object is not moving there is no force acting upon it.

• True

• False

The projectile will drop below the straight line of projection because...

• it looses speed

• it no longer accelerates

• the force of gravity acting upon it

• all of the above

What is a projectile?

• any object that is thrown

• an object that has multiple forces acting upon it

• an object that has one force of gravity acting upon it

• none of the above

An example of projectile motion is...

• a golf ball being hit

• a water fountain

• a rocket

• all of the above

If two projectiles are launched at two different heights, 2m and 10m, which one will reach the ground first?

• 2m

• 10m

• they both will hit the ground at the same time

Which of the following statements about the horizontal and vertical components of projectile motion is true?

• Changes in the horizontal component occur only when the vertical component changes.

• Both the horizontal and vertical components are always constant.

• The vertical component changes while the horizontal component stays the same.

• The horizontal and vertical components are dependent of each other.