acceleration review

A space probe is launched vertically into space. It launches from rest and accelerates at a rate of 29 m/s². How many seconds before the probe reaches the speed required to get into orbit, 7,850 m/s?

• 227650 s

• 271 s

• 227 s

• 0.0036 s

A ball at rest falls from a platform above the ground. The ball falls freely and hits the ground 1.1 s later. What is the height of the platform?

• 5.4 m

• 5.9 m

• 10.8 m

• 11.9 m

The speed of a car is decreasing uniformly from 35 m/s to 15 m/s in 4 s. The magnitude of the car's acceleration is —

• 5 m/s²

• 10 m/s²

• 20 m/s²

• 50 m/s²

An object is accelerating uniformly from 8.0 m/s to 16.0 m/s in 10 seconds. How far does the object travel in 10 seconds?

• 360 m

• 180 m

• 120 m

• 60 m

A rock is initially launched from ground level vertically reaching its highest point 4.2 seconds after being launched. Calculate the initial velocity of the rock

• 0 m/s

• 4.2 m/s

• 36 m/s

• 41 m/s

A ball initially rolling at 10 m/s comes to a stop in 25 seconds. Assuming the ball has uniform acceleration, how far does it travel during this time interval?

• 2.5 m

• 5.0 m

• 125 m

• 150 m

An airplane initially travels at 10.0 m/s when passing the “acceleration line.” The airplane then accelerates at 8.00 m/s² until reaching its take off velocity of 40.0 m/s.

What is the displacement of the plane during the acceleration?

• 3.75 m

• 93.8 m

• 100 m

• 1950 m

A ball is tossed upward on an unknown planet. The ball rises to a height of 10 m and falls back to its original position. The total trip up and down is exactly 2.0 seconds. What was the magnitude of the acceleration of the ball coming down?

• 5 m/s²

• 10 m/s²

• 20 m/s²

• 25 m/s²

A student throws a ball straight down off a very high building with a magnitude of 3.0 m/s. The ball accelerates in free fall for 2.0 s.

What is the velocity at 2.0 s?

• 1.5 m/s

• 6.0 m/s

• 18 m/s

• 23 m/s

A helicopter takes off vertically at a speed of 10 meters per second. It then accelerates at a rate of 2.0 meters per square second for 1.5 seconds. How far does it travel in those 1.5 seconds?

• 2.3 m

• 15.0 m

• 16.5 m

• 17.3 m