Physics Final

For general projectile motion with no air resistance, the horizontal component of a projectile’s velocity _____.

• continuously increases

• remains a non-zero constant

• first decreases then increases

• remains zero

An object moving East begins to slow down after stopping at a traffic traffic light. Make a statement concerning its acceleration.

• A statement cannot be made using the information given.

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A cart that starts at rest experiences a constant acceleration of 4 m/s². How far does the cart need to travel to reach a speed of 16 m/s?

• 4 m

• 8 m

• 16 m

• 32 m

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The shows Tom’s journey going from home to the bus stop. During the segment of 70 to 100 seconds, which direction is Tom moving?

• 1. Tom is moving away from his house.

• 1. Tom is moving toward his house.

• 1. Tom is standing still.

• Cannot be determined.

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Action-reaction forces from Newton’s Third Law _____.

• 1. sometimes act on the same object

• 1. always act on the same object

• 1. may form right angles

• always act on different objects

Thermal energy always moves:

• From a high temperature object to a lower temperature object.

• From a lower temperature object to a higher temperature object.

• From an object with lower kinetic energy to an object with higher kinetic energy.

• From an object of higher mass to an object of lower mass.

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Will these bar magnets in this alignment repel or attract each other?

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What conclusion can you draw from this graph?

• As current increases, magnetic strength decreases.

• As current increases, magnetic strength increases.

• As current decreases, magnetic strength increases.

• There is no relationship between current and magnetic strength.

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If a light bulb is switched on for 20 s and it consumes 2400 J of electrical energy then it's power is

• 120 W

• 70 W

• 80 W

• 90 W

If you bring a charged object near an electrically neutral surface without allowing the object to touch the surface, the charges in the surface are rearranged by

• friction.

• convection.

• induction.

• conduction.

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