Answer:
(A)
Explanation:
The net force perpendicular to the surface of the incline is the sum of the gravity force component, which is mgcos(theta), and the reactionary normal force caused by the surface of the incline. The sum is F_N - mgcos(theta) and is usually 0 which is why the object is not moving perpendicularly to the surface of the incline.
Answer:
h = 204.1 m
Explanation:
Given that,
Time taken to reach the ground, t = 7 s
We need to find the height of the cliff. We can find it using second equation of kinematics as follows :
Here,
u = 0 (at rest initially)
a = g
So,
So, the cliff's height is 204.1 m.
Answer:
Step-by-step explanation:
<u>1. Find acceleration:</u>
<u>2. Find distance traveled:</u>
3. Find work done by friction:
