PS Test 1--Force/Motion

The law of inertia applies to  

•  objects at rest. 
• moving objects. 
• both moving and nonmoving objects. 
• none of the above.

The SI unit for speed is

• mi/hr
• ft/s²
• m/s
• Δv/t

What is the equation for speed?  Speed =

• distance ÷ time
• distance x time
• distance + time
• distance - time

In the following picture, which swing will require the greater force for motion to occur?

• swing with young boy (man's right)
• swing with older boy (man's left)
• both will require the same
• too little information to tell

If Akayla drops a baseball and a bowling ball from the same height at the same time, which ball will hit the ground first? (No friction is applied)

• the bowling ball
• the baseball
• Both balls land at the same time
• the ball with the larger volume

Why does a ball thrown level to the ground move downward?

• There is no force on the ball.
• A force pulls on the ball in the direction it is thrown.
• Forces pull on the ball in both directions.
• Gravity pulls on the ball toward the ground.

An ice skater (Jayla) pushes against another ice skater (Anayah) causing both skaters to move away from each other with different accelerations. This is an example best described by

• Newton’s first law of motion for objects at rest.
• Newton’s first law of motion for objects in motion.
• Newton’s second law of motion.
• Newton’s third law of motion.

 JeShaun runs exactly 2 laps around a 400 meter track. What is the displacement?

• 800 m
• 400 m
• 0 m
• 200 m

Fritzroy walks 50 meters directly north, stops, and then travels 32 meters directly south.  What is his displacement?

• 82 meters
• 18 meters
• 28 meters
• 1.6 meters

Briajanae travels 100 km in 5 hrs. Find her average speed in km/h.

• 5km/hr
• 10km/hr
• 50km/hr
• 20km/hr