Jeffrey K. answered • 09/24/20

Together, we build an iron base in mathematics and physics

Hi Amz. Here's how to do these kinematics problems.

You only need to know the 3 main equations: v = v_{0} + at; s = v_{0}t + 1/2 at^{2}; v^{2} = v_{0}^{2} + 2 as

Then, choose the appropriate equation, depending on which variables you are given (or can calculate.)

(1) Here, we know v_{0} = 0; a = 10 m/s^{2}; and t = 60 secs; and we want to find v

Therefore, we use: v = v_{0} + at

= 0 + 10 x 60

= 600 m/sec

(2) Average velocity = (v_{0} + v) / 2

0.5 = (1 + v) / 2

1 = 1 + v

v = 0

(3) Here we use v^{2} = v_{0}^{2 }+ 2as

= 1^{2} + 2 (0.5) (35)

= 1 + 35

= 36

=> v = √36 = 6 m/sec

There you go! Be sure you understand the method - don't just copy the answer!