Answer:
Answer of the part (a) Torque is zero .
Answer of the part(b) Net Torque is -8t N.m .
Answer of the part (c) is -2 (t)^-(1/2) N.m .
Answer of the part (d) is 8(t)^-(3) N.m .
Explanation:
Explanation of all parts is in the following attachments.
<h2>Olivia is on a Swing at Playground - Option 2 </h2>
Olivia is on a swing at the playground. Her kinetic energy increasing at x and her potential energy decreasing at x. At mean position velocity is maximum so kinetic energy ( K.E ) is also maximum and at mean position potential energy is minimum. Therefore, kinetic energy is increasing and potential energy decreasing at x.
a.) Relative velocity = velocity of car B - velocity of car A
= 19 - 14
= 5 m/s
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Answers:
a) 198,55 s
b) 4687.98 m
Explanation:
a) Speed is defined as the variation of the position (distance traveled )of a body or object with time :
(1)
We are told the cheetah runs a distance of with a speed (Knowing and ), and we need to find the time it takes to travel that distance.
This means we have to find from (1):
(2)
(3)
(4)
b) Now, if we want to know the distance the cheetah will cover with in , we have to isolate from (1):
(5)
(6)
Finally: