question :- a body of mass 10 kg starting from rest accelerates uniformly to a speed of 30 metre per second in 10 seconds brakes are applied and the body stops in next 5 seconds so what is the total distance travelled by the car?
Answers
Given :-
Mass of body = m = 10 Kg
Velocity of body = u = 30 ms-¹
Total time = 10 + 5 = 15 s
v = u + at
a = u/t
a = -30/10
a = -3 ms-²
As we know that when brakes will be applied its acceleration will start decreasing and a time will come when it be on rest position.
So let the distance travelled = S
S = ut + 1/2at²
S = 30 × 15 - 1/2 × 3 × 15 × 15
S = 450 - 337.5
S = 112.5 m
Hence,
The total distance travelled = S = 112.5 m
Given :-
* 2.0
Mass of body = m = 10 Kg
Velocity of body = u = 30 ms-1
Total time = 10 + 5 = 15 s
v=u + at
a = u/t
a = -30/10
a = -3 ms-2
As we know that when brakes will be applied its acceleration will start decreasing and a time will come when it be on rest position.
So let the distance travelled = S
S = ut + 1/2at?
S= 30 x 15 - 1/2 x 3 x 15 x 15
S= 450 - 337.5
S = 112.5 m
Hence,
The total distance travelled = S = 112.5m
Thnx ✌️✌️