PHYSICS 9 First

It is the distance travelled over time.

• Acceleration

• Free Fall

• Velocity

• None

Determine the distance travelled by a car that accelerated at 3 m/s/s for 5 seconds and with a zero initial velocity.

• 37.5 m

• 80 m

• 85 m

• 90 m

Which of the following is not a principle of free fall?

1. An object in free fall experiences an acceleration of -9.8 m/s/s.

2. If an object is merely dropped (as opposed to being thrown) from an elevated height, then the initial velocity of the object is 0 m/s.

3. If an object is projected upwards in a perfectly vertical direction, then it will slow down as it rises upward.

• 1 and 2

• 3

• 1, 2 and 3

• none of these

An object fell from top of the building after 10 seconds. Determine the height of the building.

• 450 m

• 470 m

• 490 m

• 510 m

It is the force that attracts objects toward the earth.

• Velocity

• Friction

• Gravity

• Projectile

A ball is hit at an angle of 30 degrees. At what point in its trajectory does this projectile have the least speed?

• Just after it was launched

• At the highest point in its flight

• Just before it hits the ground

• Halfway between the ground and the highest point

Suppose a ping pong ball is tossed. When the ball reaches the highest point, which statement about the ball’s velocity and acceleration is true?

• Both its velocity and its acceleration are zero

• Its velocity is zero and its acceleration is not zero.

• Its velocity is not zero and its acceleration is zero.

• Neither its velocity nor its acceleration is zero.

It is an object thrown with an initial horizontal velocity and acted upon by the earth’s pull of gravity.

• Velocity

• Friction

• Gravity

• Projectile

Before beginning projectile motion problems, you need to _____.

• Split the horizontal motion and vertical motion

• Consider the impact of air resistance.

• Solve for the acceleration due to gravity.

• Determine the surface area of the projectile.

Projectiles follows a _____ path.

• Parabolic

• Hyperbolic

• trigonometric

• Vertical