CH. 3 Practice Questions

When a rock thrown straight upwards gets to the exact top of its path, its velocity is -about 10 m/s and acceleration is 0 -0 and acceleration is about 10m/s/s -0 and acceleration is 0 -none of these -about 10 m/s and acceleration is about 10 m/s/s

0 and acceleration is about 10 m/s/s

The vertical height attained by a basketball player who achieves a hang time of a full 1s is about -more than 2.5 m -2.5 m -0.8 m -1 m -1.2 m

1.2 m

Starting from the rest, the distance a free falling object will fall in about 0.5 s is about -none of these -1.0 m -1.25 m -0.5 m -5.0 m

1.25 m

An object is in free-fall. At one instant, it travels at a speed of 50 m/s. Exactly 1s later, its speed is about: -60 m/s -25 m/s -100 m/s -55 m/s -50 m/s

60 m/s

If an object falls with constant acceleration, the velocity of the object must -continually decrease -be constant also -continually change by the same amount each second -continually change by varying amounts -non of these

continually change by the same amount each second

The two measurement necessary for calculating average speed are: -acceleration and time -velocity and time -distance and acceleration -velocity and distance -distance and time

distance and time

As an object freely falls, its -acceleration increases -velocity increases -both of these -none of these

velocity increases