Question

A truck starts from rest and rolls down a hill with a constant accerelation .It travels a distance of 400m in 20 s .Find it's accerelation.Find the force acting on it if it's mass is 7 tonnes ​

Answer 1

PLS MARK BRAINLIAST

Explanation:

s=1/2at^2

400=1/2×a×(20)^2

a=2ms^-2

F=ma

=700×2

1400N

Answer 2

Answer:

a = 2 m/s^2 and F= 14000N

Explanation:

Given-

u = 0

s = 400m

t = 20s

m = 7 tonnes = 7*1000 kg = 7000 kg

a = ?

F = ?

By 2nd law of motion

s = UT + 1/2 at^2

400 = 0* 20 + 1/2 * a * 20*20

400 = 1/2*400 *a

400 = 200 * a

a = 400/200

a = 2 m/s^2

F = ma

F = 7000*2

F = 14000N

Hope it helps.