Day 4, Unit 2 Acceleration

Open Ended

Why do objects entering from space increase in velocity, in other words, when they reach the surface they have a higher velocity than when they first entered the atmosphere?

Multiple Choice

In each of the following cases, determine where the car has no acceleration ?

• A car shortly after a stoplight turns green.
• A car approaching a red light
• A car with the cruise control set at 80 km/h
• A car turning a curve at a constant speed

Multiple Choice

Acceleration only takes place when things speed up. 

• True
• False

Multiple Choice

Acceleration is defined as the CHANGE in 

• time it takes for one place to move to another place. 
• velocity of an object.
• distance divided by the time interval 
• velocity divided by the time interval 

Multiple Choice

Which of the following is a unit for acceleration?

• km/s
• m/s²
• mi/hr
• ft

Multiple Choice

The F train is traveling at the speed of 10 m/s at the top of the hill. 5 seconds later it reaches the boom of the hill and is moving at a speed of 30 m/s. What is the rate of Acceleration for the Train?

• 0.25 m/s²

• 4 m/s²

• 4 meters

• 100 m/s²

Multiple Choice

Which graph shows the object standing still?

• A
• B
• C
• D

Multiple Choice

Which of the velocity vs. time graphs below goes with the position vs. time graph shown?

Multiple Choice

What is the average acceleration in the first ten seconds?

• 4 m/s2

• 1.5 m/s²

• 10 m/s2

• 0 m/s2

Multiple Choice

A golf ball accelerates off a tee at 15m/s², changing its velocity from 0m/s to 50 m/s down the fairway. How long did it take the golf ball to accelerate?

• 750 seconds
• 35 seconds
• 0.3 seconds
• 3.3 seconds

Multiple Choice

What is the acceleration at 25 s?

• 25 m/s2

• 1.0 m/s²

• 10 m/s2

• 0 m/s2

Multiple Choice

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

Multiple Choice

In which of the following situations would a car be speeding up while traveling forward?

• positive velocity and positive acceleration

• positive velocity and negative acceleration

• negative velocity and positive acceleration

• negative velocity and negative acceleration

Multiple Choice

A drag racer accelerated from 0 m/s to 200 m/s in 5 s.  What was the acceleration?

• 0 m/s
• 40 m/s²
• -40 m/s²
• 40 m/s