7.7 Understanding Motion and Forces

What is the formula to calculate average speed?

Tags

TEKS.SCI.7.7A

If a car travels 150 kilometers in 3 hours, what is its average speed?

• 45 km/h

• 50 km/h

• 55 km/h

• 60 km/h

Tags

TEKS.SCI.7.7A

Which of the following best describes velocity?

• Speed in a given direction

• Distance covered per unit time

• The rate of change of speed

• The total distance traveled

Tags

TEKS.SCI.7.7B

A runner completes a 400-meter lap in 50 seconds. What is the runner's speed?

• 6 m/s

• 7 m/s

• 8 m/s

• 9 m/s

Tags

TEKS.SCI.7.7A

How does speed differ from velocity?

• Speed includes direction, velocity does not.

• Velocity includes direction, speed does not.

• Speed is a vector quantity, velocity is not.

• Speed and velocity are the same.

Tags

TEKS.SCI.7.7B

A cyclist travels 30 km north and then 40 km east. What is the cyclist's displacement?

• 50 km

• 70 km

• 10 km

• 100 km

Tags

TEKS.SCI.7.7B

What does a horizontal line on a distance-time graph indicate about the object's motion?

• The object is moving at a constant speed.

• The object is accelerating.

• The object is decelerating.

• The object is at rest.

Tags

TEKS.SCI.7.7C

Interpret the motion of an object if its distance-time graph is a straight line sloping upwards.

• The object is moving at a constant speed.

• The object is accelerating.

• The object is decelerating.

• The object is at rest.

Tags

TEKS.SCI.7.7C

What effect do balanced forces have on an object's motion?

• They cause the object to accelerate.

• They cause the object to decelerate.

• They keep the object in constant motion or at rest.

• They change the direction of the object's motion.

Tags

TEKS.SCI.7.7D

An object is moving with a constant velocity. What can be inferred about the forces acting on it?

• The forces are balanced.

• The forces are unbalanced.

• There are no forces acting on it.

• The object is accelerating.

Tags

TEKS.SCI.7.7D