Physics Units Kinematics

A car accelerates from rest at a constant rate 5 m/s^2 . Which of the following statements is true?

• A. The car travels 5 m in every second

• B. The car decreases its velocity 5 m/s in every second

• C. The car increases its velocity 5 m/s in every second

• D. The car’s velocity doesn’t change

Tags

NGSS.HS-PS2-1

A rock is thrown straight up from the edge of a cliff. The rock reaches the maximum height of 15 m above the edge and then falls down to the bottom of the cliff 35 m below the cliff. What is the traveled distance of the rock?

• A. 30 m

• B. 35 m

• C. 50 m

• D. 65 m

Starting from rest, a vehicle accelerates on a straight level road at the rate of 4.0 m/s2 for 5.0 s.

What is the speed of the vehicle at the end of this time interval?

• 1.3 m/s

• 10 m/s

• 20 m/s

• 80 m/s

• 100 m/s

Tags

NGSS.HS-PS2-1

Starting from rest, a vehicle accelerates on a straight level road at the rate of 4.0 m/s2 for 5.0 s.

What is the total distance the vehicle travels during this time interval?

• 10 m

• 20 m

• 25 m

• 40 m

• 50 m

Tags

NGSS.HS-PS2-1

A change in velocity over time is known as:

• acceleration
• constant speed
• average speed
• displacement

Tags

NGSS.HS-PS2-1

How do you calculate average speed?

• divide total time by total distance
• multiply total time by total distance
• divide total distance by total time
• subtract total time from total distance

A ball is thrown downward from the top of a roof with a speed of 25 m/s. After 2 s, its velocity will be:

• 19.6 m/s
• -5.4 m/s
• -44.6 m/s
• 44.6 m/s

Tags

NGSS.HS-PS2-1

What happens to the velocity of a ball as it is dropped off a cliff? 

• It decreases at a uniform rate 
• It increases at a uniform rate 
• It is constant 
• It increases at a non-uniform rate

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

An object  accelerates at 2  m/s^2. Assuming the object starts from rest, how much time does it need to accelerate to a speed of 16  m/s?

• 4 s
• 8 s
• 16 s
• 1/16 s

Tags

NGSS.HS-PS2-1

Is this a scalar quantity or a vector quantity?
Wind blowing at 20 knots

• Scalar
• Vector