Change in velocity = Final velocity - Initial velocity

Initial velocity = 20 m/s
Final velocity = 10 m/s

Change in velocity = 10 - 20 = -10m/s

Correct option B

Hope This Helps You!

4 0

4 years ago

A 92.0-kg skydiver falls straight downward with an open parachute through a vertical height of 325 m. The skydiver's velocity re

natka813 [3]

Answer: Workdone293.02KJ

Explanation: The equation to use to calculate Workdone = Change in KE + Change in PE

Assuming velocity is constant,KE becomes 0

Workdone= Change in PE=mg

W=92×9.8×325=293.02KJ

5 0

4 years ago

How much force is required to produce a torque of 100 Nm if the force is applied at an angle of 40 at a distance of 25 cm from t

Fudgin [204]

Answer:

Force, F = 622.28 N

Explanation:

It is given that,

Torque, $\tau=100\ N-m$

Angle between force and displacement, $\theta=40^{\circ}$

Distance, d = 25 cm = 0.25 m

We need to find the force required to produce the torque. Torque produced by an object is given by :

$\tau=Fd\sin\theta$

F is force required to produce torque

$F=\dfrac{\tau}{d\sin\theta}\\\\F=\dfrac{100}{0.25\times \sin(40)}\\\\F=622.28\ N$

So, applied force is 622.28 N.

7 0

3 years ago