The height of an object t seconds after it is dropped from a height of 250 meters is Find the average velocity of the object during the first 10 seconds.
A)-100.0 m/sec
B)-5.1 m/sec
C)100.0 m/sec
D)49.0 m/sec
E)-49.0 m/sec

Question

The height of an object t seconds after it is dropped from a height of 250 meters is  Find the average velocity of the object during the first 10 seconds.
A)-100.0 m/sec 
B)-5.1 m/sec 
C)100.0 m/sec 
D)49.0 m/sec 
E)-49.0 m/sec

Quizplus · Accepted Answer

The formula for average velocity is:
average velocity = (final position - initial position) / time

We need to find the initial and final positions of the object after 10 seconds. We can use the formula for the height of an object dropped from a height of 250 meters:

height = -4.9t^2 + 250

After 10 seconds, the height is:

height = -4.9(10)^2 + 250 = -240 meters

So, the initial position is 250 meters and the final position is -240 meters.

Plugging in the values, we get:

average velocity = (-240 - 250) / 10 = -49.0 m/sec

So, the best answer is E, -49.0 m/sec.

The Height of an Object T Seconds After It Is