Projectile Motion

If you throw a baseball straight up, what is its velocity at the highest point?

• about 10 m/s²

• about 10 m/s

• 0 m/s²

• 0 m/s

If you throw a baseball straight up, what is its acceleration at the highest point?

• about 10 m/s²

• about 10 m/s

• 0 m/s²

• 0 m/s

A super frog jumps straight up at a speed of 27m/s. What is the frogs speed over the next 3 seconds?

• 1 second:17 m/s, 2 seconds:7 m/s, 3seconds: -7m/.s

• 1 second:17 m/s, 2 seconds:7 m/s, 3seconds: -3m/.s

• 1 second:9 m/s, 2 seconds:3 m/s, 3seconds: 1m/.s

Suppose Lemming A runs off the edge of the cliff at 2 m/s and Lemming B runs off the edge at 1 m/s. Which will hit the ground farther from the base of the cliff?

• A

• B

• Both at the same distance

Suppose Lemming A runs off the edge of the cliff at 2 m/s and Lemming B runs off the edge at 1 m/s. Which will hit the ground first?

• A

• B

• Both at the same time

A rock is kicked horizontally off a cliff at a speed of 27m/s. What is the frogs speed 1 second later?

• vertical speed = -10m/s, horizontal speed = 27m/s

• vertical speed = -10m/s, horizontal speed = 17m/s

Which vector pair (arrow pair) correctly represents the acceleration and velocity at point P?

• 
• 
• 
• 

Two objects of the same mass are launched from the ground. Object A has a launch angle of 45, while Object B has a launch angle of 65. Which object will fly the farthest?

• A

• B

• Both objects will fly the same distance

• unable to determine with the given information

Which angle will produce the greatest range (in the absence of air resistance)?

• 0 degrees
• 45 degrees
• 90 degrees
• none of these

A skateboarder rolls off a bridge into the river as shown. If the skateboarder was originally moving at 7.0 m/s, how much time did the skateboarder spend in the air?

• 1.3 s

• 0.79 s

• 38.5 s

• 0.70 s

• Not enough information given.