Unit 1A Test - Motion

A high speed train travels with an average speed of 454 km/h. The train travels for 4 h. How far does the train travel? (speed = distance / time)

•  113.5 km
• 113.5 h
• 1,816 km
• 1,816 h

Sally sits on a rock. Her weight is an action force. Describe the rock’s reaction force.

• .It is pushed into the ground when she sits on it.
• It pushes up on her.
• It moves to the right.
• None of these

As you get closer to the center of Earth, your weight will ____.

• decrease.
• remain the same.
• increase.
• none of these.

Which example describes constant acceleration due ONLY to a change in direction?

• traveling around a circular track 
• an object in free fall
• increasing speed while traveling around a curve 
• an object at rest

If gravity did NOT affect the path of a horizontally thrown ball, the ball would ____.

• go straight up.
• fall straight down.
• follow a curved path.
• continue to travel horizontally.

A motorcycle drives 10 km in 40 minutes. What is his speed? (speed = distance/ time)

• 4 m/s
• 0. 25 km/min
• 0.25 m/s
• 4 km/min

A train approaching a crossing changes speed from 25 m/s to 10 m/s in 240 s. How can the train’s acceleration be described?

• The train’s acceleration is positive.
• The train is not accelerating. 
• The train will come to rest in 6 minutes. 
• The train’s acceleration is negative.

An object is accelerated at 15 m/s² with a force of 6,000-N.  The mass of the object is ____. (Force = mass x acceleration)

• 400 N/m/s²
• 90, 000 kg
• 400 kg 
• 90, 000 N • kg

The temperature and volume in a closed container of gas remain constant. If the number of particles of gas is increased, the gas pressure will ___.

• remain constant.
• cause a decrease in the average kinetic energy of the particles.
• increase.
• decrease.

A horizontal line on a velocity/time graph shows ____ acceleration.

• changing
• positive
• negative
• zero