A truck starts from rest and Rolls down a hill with a constant acceleration. It travels a distance of 400
m in 20s.Find its acceleration. Find the force acting on it if its mass in 7 tonnes (Hint: 1 tonnes=1000kg).
Answers
Answered by
3
Answer:
Explanation:
U =0
S= 400m
T = 20 sec
S= ut + 1/2 at²
400 = 0 + 1/2 (a)(20)²
400 = 1/2 (a)(400)
400 = a × 200
a = 400/ 200
a = 2m/s²
Answered by
1
Answer:
Initial velocity, u = 0 (since the truck is initially at rest)
Distance travelled, s = 400 m
Time taken, t = 20 s
According to the second equation of motion:
s=u + 1/2 at square
Where
Acceleration = a
400 = 0 + 1/2 a (20)sq
400 = 1/2 a (400)
a = 2m/s sq
1 metric tonne = 1000kg
Therefore 7 metric tonnes = 7000kg
Mass of truck, m = 7000 kg
From Newton’s second law of motion:
Force, F = Mass × Acceleration
F = ma = 7000 × 2 = 14000 N
Explanation:
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