physics midterm review

a wagon with a weight of 300 N is accelerated across a frictionless horizontal surface at 0.5 m/s/s. What is the net force acting on the wagon?

• 9 N

• 150 N

• 15 N

• 610 N

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NGSS.HS-PS2-1

At the instant a ball is thrown horizontally with a large force, an identical ball is dropped from the same height. Which ball hits the ground first? 

• Neither- they hit at the same time
• the horizontally thrown ball
• the dropped ball
• None of these

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NGSS.MS-PS2-2

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

• 9.8 m/s²
• 9.8 m/s
• 0 m/s²
• 0 m/s

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NGSS.HS-PS2-1

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

• 9.8 m/s²
• 9.8 m/s
• 0 m/s²
• 0 m/s

Tags

NGSS.HS-PS2-1

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.

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

What's the x-component of the following vector (13 m/s , 55°)

• 10.64 m/s

• 0.28 m/s

• 7.45 m/s

• 20 m/s

A car traveling west in a straight line decreases its speed from 30 m/s to 23 m/s in 2 seconds. Calculate the car’s acceleration.

• 3.5 m/s²
• -3.5 m/s²
• 18.5 m/s²
• 8 m/s²

Tags

NGSS.HS-PS2-1

While standing on a 10.0 m-high wall, Dennis tosses a rock into the water below. If Dennis throws the rock horizontally with a velocity of 3.0 m/s, how far out (displacement) from the edge of the cliff will it hit the water

• 30 meters

• 4.2 meters

• 3.meters

• 2 meters

A ball is thrown in the air with an initial velocity of 40 m/s. How long does it take to reach back to the point it was thrown from? Use g = 10 m/s/s

• 4 seconds 
• 2 seconds 
• 6 seconds 
• 8 seconds 

Given the Free body diagram, which of the following must be true?

• The frictional force must be accelerating the system to the left.

• The box must be accelerating to the right.

• The box must be moving to the right.

• The FBD is incorrectly drawn. This situation isn't possible

Tags

NGSS.HS-PS2-1