Acceleration

The speedometer of a car reads:

• Average speed

• Instantaneous speed

• Acceleration

• Displacement

If the speedometer of your car reads a constant speed of 40km/hr, can you say 100% for sure that the car has a constant velocity?

• Yes, because speed and velocity are the same.

• No, because velocity also depends on direction.

• Yes, because a constant speed means constant velocity.

• No, because speed and velocity are always different.

What two controls on a car can cause a change in speed?

• Steering wheel and brake pedal

• Brake pedal and accelerator pedal

• Clutch pedal and gear shift

• Headlights and windshield wipers

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-5

What is the acceleration of a car that travels in a straight line at a constant speed?

• 0 m/s²

• 5 m/s²

• 10 m/s²

• 15 m/s²

Tags

NGSS.HS-PS2-1

In which of the following situations can you accelerate even though your speed doesn’t change?

• Driving in a straight line at constant speed

• Turning a corner at constant speed

• Stopping at a red light

• Cruising downhill without changing speed

Tags

NGSS.HS-PS2-1

A roller coaster car rapidly picks up speed as it rolls down a slope. As it starts down the slope, its speed is 4 m/s. But 3 seconds later, at the bottom of the slope, its speed is 22 m/s. What is its average acceleration?

• 6 m/s²

• 4 m/s²

• 5 m/s²

• 7 m/s²

Tags

NGSS.HS-PS2-1

A cyclist accelerates from 0 m/s to 8 m/s in 3 seconds. What is his acceleration? Is this acceleration higher than that of a car which accelerates from 0 to 30 m/s in 8 seconds?

• The cyclist's acceleration is higher.

• The car's acceleration is higher.

• Both have the same acceleration.

• Cannot be determined from the given information.

Tags

NGSS.HS-PS2-1

A car advertisement states that a certain car can accelerate from rest to 70 km/h in 7 seconds. Find the car’s average acceleration.

• 10 m/s²

• 2.78 m/s²

• 5 m/s²

• 7 m/s²

Tags

NGSS.HS-PS2-1

What is the lizard’s average acceleration if it accelerates from 2 m/s to 10 m/s in 4 seconds?

• 2 m/s²

• 4 m/s²

• 6 m/s²

• 8 m/s²

Tags

NGSS.HS-PS2-1

Match the following scenarios with the correct acceleration values.

• A car increases its speed from 10 m/s to 14 m/s in 4 seconds.

• 3 m/s²

• A cyclist accelerates from 0 m/s to 12 m/s in 4 seconds.

• 4 m/s²

• A train speeds up from 20 m/s to 36 m/s in 4 seconds.

• 2 m/s²

• A runner speeds up from 5 m/s to 9 m/s in 4 seconds.

• 1 m/s²

Tags

NGSS.HS-PS2-1