AP Physics Projectile Motions Pt.2

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? Select one: a. 30° and 60° b. 30° and 80° c. 40° and 60° d. 40° and 80°

a

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 Select one: a. 1 g downward. b. 1 g upward. c. 0 g. d. none of these e. larger than 1 g.

a

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

a

Which of the following is the motion of objects moving in two dimensions under the influence of gravity? Select one: a. projectile motion b. horizontal velocity c. vertical velocity d. directrix

a

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. Select one: a. cannot tell without knowing the masses b. They hit at the same time. c. The dropped bullet hits first. d. The fired bullet hits first.

b

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? Select one: a. the fired one b. the dropped one c. Both hit at the same time. d. depends upon the caliber of the bullet

b

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

b

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? Select one: a. the ball b. the stone c. It is impossible to tell from the information given. d. Neither, since both are traveling at the same speed.

b

The path of a projectile through space is called its: Select one: a. equilibrant b. trajectory c. range d. torque

b

What is the path of a projectile (in the absence of friction)? Select one: a. a hyperbola b. a parabola c. Projectiles do not follow a predictable path. d. a wavy line

b

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

b

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 Select one: a. depend on the speed of the plane when the bomb was released. b. be behind the bomb. c. be over the bomb. d. be in front of the bomb.

c

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

c

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? Select one: a. Hyperbola b. Ellipse c. Parabola d. Circle

c

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) Select one: a. 60 degrees b. depends on the mass of the projectiles c. 30 degrees d. they hit at the same time

c

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

c

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 Select one: a. half as much. b. 1.4 times as much. c. four times as much. d. twice as much.

c

At what angle should a water-gun be aimed in order for the water to land with the greatest horizontal range? Select one: a. 60° b. 0° c. 30° d. 45°

d

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

d

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

d