Physics Test

Someone standing at the edge of a cliff throws one ball straight up and another ball straight down at the same initial speed. Neglecting air resistance, the ball to hit the ground below the cliff with the greatest speed will be the one initially thrown:

...they will both hit with the same speed

An object travels 8 meters in the first second of travel, 8 meters again during the second second of travel, and 8 meters again the third second. Its acceleration is _____ m/s2 :

0m/s

Starting from rest, a freely-falling object will fall in one half second, a distance of about:

1.2m

The muzzle velocity of a certain rifle is 100. m/s. At the end of one second, a bullet fired straight up into the air will travel a distance of:

100-4.9m

An object falls freely from rest on a planet where the acceleration due to gravity is 20 m/s2. After 5.0 seconds the object will have a speed of:

100m/s

Ten seconds after starting from rest, a freely-falling object will have a speed of about:

100m/s

An apple falls from a tree and hits the ground 5 meters below. It hits the ground with a speed of about:

10m/s

If a freely-falling object were somehow equipped with a speedometer, its speed reading would increase each second by approximately:

10m/s

if a freely-falling object were somehow equipped with a speedometer on a planet where the acceleration due to gravity is 20 m/s2, then its speed reading would increase each second by:

20m/s

An object falls freely from rest on a planet where the acceleration due to gravity is 20. m/s2. After 5 seconds it falls a distance of :

250m

Starting from rest, a freely-falling object will fall in 10 seconds a distance of about:

500m

A ball is thrown upwards. What upward speed does the ball need to have in order to remain in the air for a total time of 10 seconds?

50m/s

An object is in free fall. At one instant, it is traveling at a speed of 50 m/s. Exactly one second later, its speed is about:

60m/s

A bullet is fired straight down from the top of a high cliff. Neglecting air resistance, the acceleration of the bullet is:

9.8m/s^2

if you drop an object, it will accelerate downward at a rate of 9.8 m/s2. If you instead throw it downward, its acceleration (in the absence of air resistance) will be:

9.8m/s^2

It takes 6.0 seconds for a stone to fall to the bottom of a mine shaft. How deep is the shaft?

about 180m

Disregarding air resistance, objects fall at a constant:

acceleration

A heavy object and a light object are dropped at the same time from rest in a vacuum (a space defined by the absence of air). The heavier object reaches the ground:

at the same time as the lighter object

if an object falls with a constant acceleration, the velocity of the object must:

continually change by the same amount each second

If a freely-falling object were somehow equipped with an odometer to measure the distance it travels, then the amount of distance it travels each succeeding second would be:

greater than the second before

A bullet is dropped into a river from a very high bridge. At the same time, another bullet is fired from a gun straight down towards the water. Neglecting air resistance, the acceleration just before striking the water:

is the same for each bullet

A ball is thrown upwards and caught when it comes back down. Neglecting air resistance, the speed with which it is caught is:

the same as the speed it had when thrown upwards

One half second after starting from rest, a freely-falling object will have a speed of about:

the speed is about 4.9 m/s

A feather and a coin will have equal accelerations when falling in a vacuum because:

their accelerations are the same and gravity does in act in a vacuum

In each second of fall, the distance a freely falling object will fall is about:

unequal amounts depending on the time of the fall squared

An object freely falls. Its

velocity increases

When a rock thrown straight upwards gets to the exact top of its path, its:

velocity is zero and its acceleration is 10 m/s^2