C2 8.6A,B, 6.8C,D Force Motion and Energy

What is the difference between the velocity and the speed of an object?

• Velocity is the change in distance over time, while speed is the change in velocity over time.

• Velocity has a direction associated with it, while speed has no specific direction.

• Velocity has no direction associated with it, while speed has a specific direction.

• Velocity is the change in speed over time, while speed is the change in distance over time.

Which of the following best describes the velocity of an object?

• 30 m/s

• 30 m east

• 30 m/s² east

• 30 m/s²

Carts of different masses are pulled along a flat surface. The table shows some variables for each cart. Which two carts experience the same net force?

• Carts 1 and 2

• Carts 1 and 3

• Carts 2 and 3

• Carts 2 and 4

Tags

NGSS.MS-PS2-2

Four students designed and built air propelled rockets that were launched into the air. Their data are recorded in the table. Which rocket had the greatest acceleration?

• Rocket 1

• Rocket 2

• Rocket 3

• Rocket 4

Tags

NGSS.MS-PS2-2

A sledgehammer has a mass of 3.5 kilograms. What net force, to the nearest whole newton, will a person need to apply to accelerate the sledgehammer at a rate of 4.0 m/s²?

Record your answer and fill in the boxes. Be sure to use the correct place value.

Tags

NGSS.MS-PS2-2

A toy truck is at rest on the floor. Which statement describes the forces acting on the toy truck?

• The forces are balanced so motion occurs.

• The forces are balanced so no motion occurs.

• The forces are unbalanced so motion occurs.

• The forces are unbalanced so no motion occurs.

Four students push carts filled with sports equipment across the gym. Each student pushes with the same amount of force. Which cart has the greatest change in speed?

• 
• 
• 
• 

Tags

NGSS.MS-PS2-2

Which of these accurately describes the motion of the toy train?

• The toy train speeds up while going forward and then slows down.

• The toy train slows down while going forward and then moves backward.

• The toy train moves forward at a constant speed, slows down, and then stops.

• The toy train moves forward at an increasing speed, stops, and then moves forward.

Tags

NGSS.MS-PS3-1

A car travels at a constant speed of 15 m/s for 2 minutes. The car increases its speed from 15 to 25 m/s during the next minute and then travels at a constant speed of 25 m/s for 2 more minutes. Which of the following graphs best represents the car’s motion during this 5-minute period?

• 
• 
• 
• 

Tags

NGSS.MS-PS3-1

The distance a toy car travels over time is shown in the graph. Which table best shows the average speed of the toy car at different time intervals?

• 
• 
• 
• 

Tags

NGSS.MS-PS3-1