Physics Practice Final

The graph below represents the relationship between velocity and time for an object moving along a straight line. What is the magnitude of the object's acceleration?

• 5.0 m/s²

• 8.0 m/s²

• 10. m/s²

• 20. m/s²

The graph below represents the relationship between velocity and time for an object moving along a straight line. In addition to the data in the graph above, what else would students

need to measure to determine the magnitude of the net force on this

object?

• Mass only

• Distance the object travels each second

• The direction of the motion

• The mass of the object and the distance it travels each second

A projectile is launched from the ground and lands at the same height from which it was launched. For which initial velocity will the projectile be in the air the longest? [Neglect friction.]

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Tags

NGSS.HS-PS2-4

A 6.0-kg cart initially traveling at 4.0 m/s East accelerates uniformly at 0.50 m/s² East for 3.0 seconds. What is the velocity of the cart at the end of this 3.0 second interval?

• 1.5 m/s East

• 3.0 m/s East

• 5.5 m/s East

• 7.0 m/s East

A 5.0-kilogram box is sliding across a level floor. The box is acted upon by a force of 27 newtons east and a frictional force of 17 newtons west. What is the magnitude of the acceleration of the box?

• 0.50 m/s²

• 2.0 m/s²

• 8.8 m/s²

• 10. m/s²

Tags

NGSS.HS-PS2-1

The diagram below represents a 2.0-kilogram toy car moving at a constant speed of 3.0 meters per second counterclockwise in a circular path with a radius of 2.0 meters. At the instant shown in the diagram, the centripetal force acting on the car is --

• 6 N

• 9 N

• 12 N

• 36 N

The diagram below represents a 2.0-kilogram toy car moving at a constant speed of 3.0 meters per second counterclockwise in a circular path with a radius of 2.0 meters. 8. 9. The centripetal force on this toy car at the instant shown in the diagram -

• Directed North and is the result of the normal force on the car

• Directed West and is the result of the normal force on the car

• Directed North and is the result of the friction force on the car

• Directed West and is the result of the friction force on the car

Tags

NGSS.HS-PS2-1

The diagram below represents a 2.0-kilogram toy car moving at a constant speed of 3.0 meters per second counterclockwise in a circular path with a radius of 2.0 meters. If the car hits a patch of ice at the instant shown in the diagram what direction will it continue to move?

• North

• West

• Northeast

• Northwest

Tags

NGSS.HS-PS2-1

The graph below shows the relationship between distance, d, and time, t, for an object moving in a straight line. Which of the graphs below could represent the velocity-time graph that matches the position-time graph above?

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14. A student wishes to record a 7 .5-kilogram watermelon colliding with the ground at a speed of 30 m/s. How long must the watermelon fall freely from rest so it would be traveling at 30 m/s the instant it hits the ground? [Hint: This is a free-fall question. g = 10m/s²]

• 1 second

• 2 seconds

• 3 seconds

• 4 seconds

Tags

NGSS.HS-PS2-1