F = ma
200 = 50 * a
4 = a
Therefore acceleration is 4ms^-2
<h2>Answer :</h2><h2 />
Work is the amount of energy transferred. As per the formula
Work = Force x Distance [moved toward the direction of the force]
So as per the formula
<u>Solution : </u>
Force = 825 N
Distance = 35 m
Work = 825 (n) x 35 (m)
Work = 28875 Joules
<h2 />
Answer:
W = 20 J
Explanation:
Given that,
The mass of a loaded sack, m = 1000 g = 1 kg
It falls down from the floor of a lorry 200 cm high, h = 2 m
We need to find the work done by the gravity. The work done by an object under the action of gravity is given by :
W = mgh
Substitute all the values,
W = 1 × 10 × 2
= 20 J
Hence, the required work done by gravity is equal to 20 J.
Answer:
The value of impulse of the net force on the ball during its collision with wall is 
The value of average horizontal force that the wall exerts on the ball during the impact is F = 15000 N
Explanation:
Mass of the ball = 0.5 kg
Horizontal velocity
= 20 
Velocity after collision
= - 10 
(A). Impulse of the net force on the ball during its collision with wall is

I = 0.5 × (20 + 10)

This is the value of impulse of the net force on the ball during its collision with wall.
(B). The magnitude of average horizontal force

Where F = Force
I = impulse & t = time interval = 0.001 sec

F = 15000 N
This is the value of average horizontal force that the wall exerts on the ball during the impact.
Answer:
Opposition of passing a electric circuit