Motion and Forces

A sailboat on a lake sails 40. meters north and then sails 40. meters due east. Compared to its starting position, the new position of the sailboat is

• 40. m due east

• 40. m due north

• 57 m northeast

• 80. m northeast

A ball is thrown straight upward from the surface of Earth. Which statement best describes the ball’s velocity and acceleration at the top of its flight?

• Both velocity and acceleration are zero.

• Velocity is zero and acceleration is nonzero.

• Velocity is nonzero and acceleration is zero.

• Both velocity and acceleration are not zero.

Tags

NGSS.HS-PS2-1

How would the mass and weight of an object on the Moon compare to the mass and weight of the same object on Earth?

• Mass and weight would both be less on the Moon.

• Mass would be the same but its weight would be less on the Moon.

• Mass would be less on the Moon and its weight would be the same.

• Mass and weight would both be the same on the Moon.

Tags

NGSS.HS-PS2-4

As shown in the diagram below, a rope attached to a 500.-kilogram crate is used to exert a force of 45 newtons at an angle of 65 degrees above the horizontal. The horizontal component of the force acting on the crate is

• 19 N

• 210 N

• 41 N

• 450 N

Tags

NGSS.HS-PS2-1

A 40.0-kilogram child exerts a 100.-newton force on a 50.0-kilogram object. The magnitude of the force that the object exerts on the child is

• 0.0 N

• 80.0 N

• 100. N

• 125 N

Tags

NGSS.HS-PS2-1

A student is standing in an elevator that travels from the first floor to the tenth floor of a building. The student exerts the greatest force on the floor of the elevator when the elevator is

• accelerating upward as it leaves the first floor

• slowing down as it approaches the tenth floor

• moving upward at constant speed

• at rest on the first floor

Tags

NGSS.HS-PS2-1

At the bottom of a hill, a car has an initial velocity of +16.0 meters per second. The car is uniformly accelerated at −2.20 meters per second squared for 5.00 seconds as it moves up the hill. How far does the car travel during this 5.00-second interval?

• 107 m

• 74.5 m

• 52.5 m

• 25.0 m

Tags

NGSS.HS-PS2-1

As represented in the diagram, an object of mass m, located on the surface of the Moon, is attracted to the Moon with a gravitational force, F. An object of mass 2m, at an altitude equal to the Moon’s radius, r, above the surface of the Moon, is attracted to the Moon with a gravitational force of

•  $F$  
  

•  $2F$  

•  $\frac{F}{2}$  

•  $\frac{F}{4}$  

Tags

NGSS.HS-PS2-4

The graph 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

• 10. m/s²

• 8.0 m/s²

• 20. m/s²

Tags

NGSS.HS-PS2-1

A projectile lands at the same height from which it was launched. Which initial velocity will result in the greatest horizontal displacement of the projectile? [Neglect friction.]

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