physics test

During the first 50 seconds a truck traveled at a constant speed of 25 m/s. Find the distance it traveled.

x --- = 50 25 ---- 1 = 1250 m

Acceleration

final velocity-initial velocity/time

What is the average speed?

total distance divided by total time

How long does it take an airplane to fly 1500 miles if it maintains a speed of 600 miles per hour?

1500 ---- = 2.5 h 600

An object is moving at a velocity of 23 m/s. It accelerates to a velocity of 85 m/s over a time of 8.3 s. What acceleration did it experience?

85 m/s - 23 m/s ------------------ 8.3 s = 62 m/s --------- 8.3 s = 7.47 m/s squared

If an object is accelerating from rest, with a constant acceleration of 5.4 m/s squared, what will its velocity be after 28s?

5.4 m/s squared = Vf - 0 ------- 28s multiply 28 on both sides which will make the 28 go away 151.2 m/s squared= Vf

Velocity

Initial velocity + final velocity/ 2

Speed

average distance/average time