Question

a
truck starts from rest and rolls down a hill with constant acceleration
distance of 400 m. in 20 sec.
. It travels a​

Answer 1

Answer:

Explanation:

The truck starts from rest, so initial velocity = 0

Distance travelled = 400 m

Time taken = 20 s

We know the equation of motion, S = ut + ½ at2

400 = 0 + ½ a * (20)2

a = 2 m/s2

Now, mass = 7 metric tonnes

= 7 * 1000

= 7000 kg

So force = mass * acceleration

F = 7000 * 2

= 14000 N

Answer 2

Answer:

speed *accelaration

which equal to 400*20=8000