Intro to Physics Review

Why should you specify a reference frame when describing motion?

• motion appears the same in all reference frames

• reference frames affect the motion of an object

• a description of motion depends on the reference frame

• you can see motion better from certain reference frames

If you cut a bar magnet in half, the result is ...

• the magnet explodes

• you have one working magnet and one nonfunctional magnet

• two half-magnets

• two working magnets

the interaction of high energy particles from the sun encountering atoms in the earth's atmosphere results in

• the magnetosphere

• the Aurora Borealis (in the northern hemisphere)

• the ocean's tides

• frequent seismic activity (earthquakes) in California

Which below is not false?

• all magnets have north and south poles

• the area surround a magnet is an electrical field

• a compass is unaffected by another magnet

• magnetic field lines run from south to north

Drake races in the 100 meter dash. It takes him 8.8 seconds to finish. What is his average speed?

• 88 m/s

• 880 m/s

• 11.4 m/s

• 0.09 m/s

What is friction?

• a force that causes uncontrollable slipping. 
• a force that opposes the sliding motion between two touching surfaces. 
• friction is a force for good

Which type of force(s) will cause a change in an object's motion?

• equal forces
• zero net force
• balanced forces
• unbalanced forces

Tags

NGSS.MS-PS2-2

What two measurements are necessary for calculating speed?

• Mass and time
• Temperature and mass
• Mass and distance
• Distance and time

Tags

NGSS.MS-PS3-1

Two classes are playing tug-of-war and both classes are not moving.  How would you describe the forces?

• Balanced
• Unbalanced
• Combined
• Net Force

Tags

NGSS.HS-PS2-1

In a tug of war the left team pulls with a force of 200N. The right team pulls with a force of 150N.  What is the net force?

• 50N to the left.
• 350N to the left.
• 350N to the right.
• 50N to the right.

Tags

NGSS.HS-PS2-1