AP Physics Unit 1 Review

When a football in a field goal attempt reaches its maximum height, how does its speed compare to its initial speed?. It is less than its initial speed. It is zero. It is greater than its initial speed. It is equal to its initial speed.

It is less than its initial speed

A soldier throws a grenade horizontally from the top of a cliff. Which of the following curves best describes the path taken by the grenade? Hyperbola, Parabola, Circle, Ellipse

Parabola

A rock is thrown upward at 50 degrees with respect to the horizontal. As it rises, neglecting air drag, its horizontal component of velocity decreases. depends upon its mass remains unchanged. increases.

Remains unchanged

A hunter on level ground fires a bullet at an angle of 10 degrees above the horizontal while simultaneously dropping another bullet from the level of the rifle. Which bullet will hit the ground first? the fired one both hit at the same time. depends upon the caliber of the bullet the dropped one

The dropped one

A stone is thrown horizontally from the top of a tower at the same instant a ball is dropped vertically. Which object is traveling faster when it hits the level ground below? the ball Neither, since both are traveling at the same speed. It is impossible to tell from the information given. the stone

The stone

The path of a projectile through space is called its

trajectory

A stone is thrown horizontally from the top of a cliff. One second after it has left your hand, its vertical distance below the top of the cliff is 15 m. 5 m. 0 m 10 m.

5

A bullet is fired horizontally, and at the same instant a second bullet is dropped from the same height. Ignore air resistance. Compare the times of fall of the two bullets. They hit at the same time. cannot tell without knowing the masses The fired bullet hits first. The dropped bullet hits first.

They hit at the same time

At what angle should a water-gun be aimed in order for the water to land with the greatest horizontal range? 60° 45° 30° 0°

0

Two projectiles are fired from ground level at equal speeds but different angles. One is fired at an angle of 30 degrees and the other at 60 degrees. The projectile to hit the ground first will be the one fired at (neglect air resistance). 30 degrees they hit at the same time 60 degrees depends on the mass of the projectiles

30 degrees

A ball is thrown at an original speed of 8.0 m/s at an angle of 35° above the horizontal. What is the speed of the ball when it returns to the same horizontal level? 9.8 m/s 4.0 m/s 8.0 m/s 16 m/s

8.0 m/s

A bullet fired horizontally over level ground hits the ground in 0.5 second. If it had been fired with twice the speed in the same direction, it would have hit the ground in depends upon the caliber of the bullet 0.5 s. more than 0.5 s. less than 0.5 s.

0.5 s

An object is dropped and freely falls to the ground with an acceleration of 1 g. If it is thrown upward at an angle instead, its acceleration will be 1 g downward. none of these 1 g upward. 0 g. larger than 1 g.

1 g downward

A plane flying horizontally at a speed of 50.0 m/s and at an elevation of 160 m drops a package. Two seconds later it drops a second package. How far apart will the two packages land on the ground? 162 m 177 m 100 m 283 m

100

An Olympic athlete throws a javelin at four different angles above the horizontal, each with the same speed: 30°, 40°, 60°, and 80°. Which two throws cause the javelin to land the same distance away? 30° and 80° 30° and 60° 40° and 60° 40° and 80°

30 and 60

Which of the following does not exhibit parabolic motion? a basketball thrown to a hoop a frog jumping from land into water a baseball thrown to home plate a flat piece of paper released from a window

A flat piece of paper released from a window

Which of the following is not an example of projectile motion? a long jumper in action a hot-air balloon drifting toward Earth a baseball hit by a bat a volleyball served over a net

A hot-air balloon drifting toward Earth

What is the path of a projectile (in the absence of friction)? a parabola a hyperbola a wavy line Projectiles do not follow a predictable path.

A parabola

Which of the following is an example of projectile motion? an aluminum can dropped straight down into the recycling bin a thrown baseball a space shuttle being launched a jet lifting off a runway

A thrown baseball

Two balls are thrown horizontally. Ball C is thrown with a force of 20 N, and ball D is thrown with a force of 40 N. Assuming all other factors are equal, ball D will fall toward the ground faster than ball C. more slowly than ball C. at the same rate as ball C. at a rate that cannot be compared with that of ball C using the information given.

At the same rate as ball C

A pilot drops a bomb from a plane flying horizontally at a constant speed. Neglecting air resistance, when the bomb hits the ground the horizontal location of the plane will depend on the speed of the plane when the bomb was released. be in front of the bomb. be behind the bomb. be over the bomb.

Be over the bomb

A rock is thrown upward at 50 degrees with respect to the horizontal. As it rises, neglecting air drag, its vertical component of velocity remains unchanged. depends upon its mass decreases. increases.

Decreases

You are throwing a ball for the second time. If the ball leaves your hand with twice the velocity it had on your first throw, its horizontal range R (compared to your first serve) would be 1.4 times as much. four times as much. twice as much. half as much.

Four times as much

Which of the following is the motion of objects moving in two dimensions under the influence of gravity? vertical velocity, projectile motion, directrix, horizontal velocity

Projectile Motion

Roll a bowling ball off the edge of a table. As it falls, its horizontal component of velocity is always zero increases. remains constant. decreases.

Remains constant

A hunter on level ground fires a bullet at an angle of 2 degrees below the horizontal while simultaneously dropping another bullet from the level of the rifle. Which bullet will hit the ground first? the fired one Both hit at the same time. depends upon the caliber of the bullet the dropped one

The fired one