Kinematics Equations

Do free falling objects move at constant velocity or do they accelerate?

• Falling objects accelerate at -9.8 m/s²

• Falling object move at constant velocity

• Falling objects accelerate at 100 m/s²

• It depends on the mass: heavy objects accelerate, light objects do not

Tags

NGSS.MS-PS2-2

Meters per second is the unit for which physics concept?

• initial velocity

• acceleration

• time

• distance

Tags

NGSS.MS-PS3-1

Meters per second squared is the unit for which physics concept?

• distance

• time

• acceleration

• final velocity

What would you mathematically do first to solve for v_f in the following equation?

• multiply 2, 4.9 and 200

• add 2, 4.9 and 200

• subtract 2, 4.9 and 200

• multiply 2, 4.9 and 200 by 2

A car, initially traveling east with a speed of 5.0 meters per second, is accelerated uniformly at 2.0 meters per second² for 10 seconds along a straight line. What total distance does the car travel during this 10 second interval?

What is the acceleration of the car in the above problem?

• 5 m/s

• 2 m/s²

• 10 s

• 0 m/s

A skier starting from rest skis straight down a slope 50 meters long in 5.0 seconds. What is the magnitude of the acceleration of the skier?

What is the initial velocity of the skier in the above problem?

• 0 m/s

• 50 m

• 5.0 s

• unknown

A skier starting from rest skis straight down a slope 50 meters long in 5.0 seconds. What is the magnitude of the acceleration of the skier? What is the displacement of the skier in the above problem?

• 0 m/s

• 5.0 s

• 50 m

• -50 m

Tags

NGSS.MS-PS2-2

A test car gets up to a certain speed and then slams the brakes and skids to a stop. If it takes 5.0 s for the car to stop and the skid marks are 40.0 m long, what was the velocity of the car when it hit the brakes?

What is the final velocity of the car in the above problem?

• 40 m

• 5 s

• 0 m/s

• unknown

Meters is the unit for which physics concept?

• initial velocity

• acceleration

• final velocity

• time

• distance

Seconds is the unit for which physics concept?

• acceleration

• time

• final velocity

• distance

• initial velocity