1D kinematics problem solving #1

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

A car is traveling at 21.0 m/s. It slows to a stop at a constant rate over 5.00 s. How far does the car travel during those 5.00 seconds before it stops? (HINT: This is a 2 step problem and you must find the acceleration FIRST)

• 4.20 m

• 52.5 m

• 105 m

• 158 m

In each of the following cases, determine which car has the greatest acceleration.

• starts from 0 m/s to 20 m/s in 4 seconds.

• speed up from 20m/s to 40m/s in 3 seconds

• slow down from 50m/s to stop in 2 seconds

• starts from 0 m/s to 20m/s in 5 seconds

Which of the following are considered to be scalar quantities? Pick all that apply.

• the temperature of a room

• the acceleration of a runner

• the speed of a snail

A feather is dropped on the moon from a height of 1.40 meters. The acceleration of gravity on the moon is 1.67 m/s². If we wanted to determine the time for the feather to fall to the surface of the moon, which equation should you use to solve the above problem the most efficiently?

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 A car increases its speed from 9.6 meters per second to 11.2 meters per second in 4.0 seconds. The average acceleration of the car during this 4.0-second interval is

• 0.40 m/s²
• 2.4 m/s²
• 2.8 m/s²
•  5.2 m/s²

Tags

NGSS.HS-PS2-1

A roller coasters accelerates from an initial velocity of 6.0 m/s to a final velocity of 70 m/s over 4 seconds.  What's the acceleration?

• 24 m/s²
• 18 m/s²
• 16 m/s²
• 16 m/s

Tags

NGSS.HS-PS2-1

A golf ball starts with a speed of 2 m/s and slows at a constant rate of 0.5 m/s², what is its velocity after 2 s?

• 0 m/s
• 0.5 m/s
• 1 m/s
• 1.5 m/s

Tags

NGSS.HS-PS2-1

A dog runs with an initial speed of 7.5 m/s to a stop in 15 seconds.  What is the dog's acceleration?

• -7.5 m/s
• -7.5 m/s²
• -0.5 m/s²
• 7.5 mi//hr

Tags

NGSS.HS-PS2-1

An airplane accelerates down a runway at 3.20 m/s/s
for 8 s until it finally lifts off the ground.
Determine the velocity at take-off.

• 0.4 m/s
• 25.6 m/s
• 2.5 m/s

Tags

NGSS.HS-PS2-1