Physics Final Review

When the frictionless system shown above is accelerated by an applied force of magnitude the tension in the string between the blocks is

• F

• 2/3 F

• ½ F

• 1/3 F

Tags

NGSS.HS-PS2-1

A block of weight W is pulled along a horizontal surface at constant speed v by a force F, which acts at an angle θ with the horizontal, as shown above. The normal force exerted on the block by the surface has magnitude

• greater than W

• greater than zero but less than W

• equal to W

• zero

Tags

NGSS.HS-PS2-1

A block of mass 3m can move without friction on a horizontal table. This block is attached to another block of mass m by a cord that passes over a frictionless pulley, as shown above. If the masses of the cord and the pulley are negligible, what is the magnitude of the acceleration of the descending block?

• g/4

• g/3

• 2g/3

• g

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

Each of the diagrams below represents two weights connected by a massless string which passes over a massless, frictionless pulley. In which diagram will the magnitude of the acceleration be the largest?

• 
• 
• 
• 

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NGSS.HS-PS2-1

NGSS.HS-PS2-4

A ball attached to a string is whirled around in a horizontal circle having a radius R. If the radius of the circle is changed to 4R and the same centripetal force is applied by the string, the new speed of the ball is which of the following?

• One-quarter the original speed

• One-half the original speed

• The same as the original speed

• Twice the original speed

Tags

NGSS.HS-PS2-1

The velocity is always _____ to the line of a circle.

• outwards
• towards the center
• tangent
• faster

Which statement is true about an object that is traveling in uniform circular motion?

• The speed of the object varies.

• The net force on the object is directed toward the center of the circular path.

• The direction of the object's velocity is constant.

Centripetal acceleration always points

• in the direction of the object's motion

• in the opposite direction of the object's motion

• towards the center of the circle

• towards the outside of the circle

Identify the force that determines the centripetal force as a car is turning a corner.

• Friction Force

• Tension Force

• Normal Force

• Centripetal Force

Other than gravity what is the other force that is contributing to the net force of the coaster at the top of the loop?

• Tension Force

• Friction Force

• Centripetal Force

• Normal Force

Tags

NGSS.HS-PS2-1