kinematics quiz- general

An object  accelerates at 2  m/s². 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

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

An airplane lands on a runway with a velocity of 150 m/s. How far will it travel until it stops if its rate of deceleration is constant at -3 m/s²?

• 525 m
• 3750 m
• 6235 m
• 9813 m

A pumpkin is dropped from a 35 m building. What is its initial velocity (v_i)?

• 9.8 m/s²
• 35 m
• 0 m/s
• 9.8 m/s

Calculate the average speed/velocity

• .6 m/s

• .7 m/s

• 4 m/s

• 1.5 m/s

Calculate the average speed using the table.

• 3 m/s

• .7 m/s

• 1.5 m/s

• .6 m/s

Sometime in the distant future, scientists on Earth discover a new planet. Because of emerging technology, space travel is now easier than ever before!

While visiting, a group of scientists want to determine the acceleration due to gravity on this new planet. They throw a rock straight up with an initial velocity of 25 m/s and analyze the velocity and time of its trajectory. Once the rock has been thrown up, how long does it take before it reaches its maximum height?

• 0 s

• 4 s

• 2.75 s

• 11.4 s

The police have asked for your help in the investigation of a car accident.

The police inform you that based on the skid marks left on the pavement, the car was braking for 35.6 meters. From additional testing it was discovered that the friction between the car and the pavement provided an acceleration of -8.4 m/s2. When examining the impacted cars, the police estimated that the car in question was traveling at 5.1 m/s just after the collision.

If the speed limit of that road was 20 m/s, was the car speeding through this zone?

• 1. The car was traveling at 7.2 m/s and therefore was not speeding.

• 1. The car was traveling at 14.9 m/s and therefore was not speeding.

• 1. The car was traveling at 25.0 m/s and therefore was speeding.

• 1. The car was traveling at 32.7 m/s and therefore was speeding.

You and your friends are having a competition to see who among you can throw a ball the highest. You play baseball, so you know that you can throw a ball at 29.1 m/s.

On your attempt, the ball was in the upward trajectory for 3.0 seconds. How far up did the ball go?

• 87.3 m

• 43.2 m

• 131.4 m

• 72.6 m

The Mythbusters team is planning an episode to test a myth: The team decides to have one of their members stand on the back of a truck and prepare to throw a ball backwards while the truck is moving forward.  During the team’s first trial, the ball was thrown at -13 m/s while the truck traveled at 15 m/s. 

 Which best describes the motion an observer off to the side will see regarding the ball?

• A. The ball will travel at 2 m/s forward in the same direction as the truck was moving.

• 1. The ball will travel at 2 m/s backwards in the opposite direction as the truck is moving.

• The ball will travel at 28 m/s forward in the same direction as the truck was moving

• 1. The ball will travel at 28 m/s backwards in the opposite direction as the truck is moving.