DST and motion graphs

These toy cars are designed to keep a constant speed. Are the toy cars in the picture accelerating during a race on this track? If so, why?

• Yes, they are accelerating every time they go around a turn. A change in direction is acceleration.

• Yes, they are accelerating because the speed will change.

• No, their speed did not change so they did not accelerate.

• No, their direction changed which is not an acceleration.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A car travels 300 km in 6 hours. What is the average speed of the car?

• 0.02 km/hr

• 1,800 km/hr

• 50 km/hr

• 50 km

A storm is moving toward your house at a speed of 20 km/hr. It is now 60 km away from your house. What time will the storm reach your house?

• 0.3 hours

• 1200 hours

• 3 km

• 3 hours

A hot air balloon traveled 2.5 hours at a speed of 450 km/hr. What distance did it travel?

• 87 m/s

• 1300 m/s

• 180 km

• 1,125 km

What happened during point D to point E?

• increasing speed

• decreasing speed

• moving at a constant speed

• not moving

Tags

NGSS.MS-PS3-1

What happened during point B to point C?

• increasing speed

• decreasing speed

• moving at a constant speed

• not moving

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-1

What is happening between point B to point D

• increasing speed

• decreasing speed

• constant speed

• no motion

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

What is the net force acting on the rope?

• 20N to the left

• 1,080N to the right

• 0N

• 20 N to the right

Tags

NGSS.MS-PS2-2

What can you determine using the information in the table?

• The velocity of each car

• The acceleration of each car

• The average speed of each car

• The direction traveled by each car

Tags

NGSS.MS-PS3-1

The geese fly 22 mph south when they migrate for winter.

• Speed

• Velocity

• Acceleration

Tags

NGSS.MS-PS3-1