How do you find acceleration when you are only given mass?

Question

Could someone please tell me how to find acceleration when you are only given mass? Below is the force problem I am trying to solve:
A 20 kg wooden crate falls from a truck when it is traveling along a straight and level road at 25 m/s. If the crate slides for a distance of 80m in coming to rest, find acceleration.

I would appreciate it if someone would help.

Answer 1

use this equation
c
and
0=25-a*t

solve for a

a*t=25

80=25*t-.5*25*t
t=80*2/25
a=25^2/160


j

Answer 2

Hmmm.... they are kind of fooling you here. You don't need to know the mass at all. A 2kg crate would move just the same under the same acceleration on the road. So would a 2 ton container. The mass does not matter. All you need to calculate is how much CONSTANT acceleration does it take to stop something that moves at an initial speed of 25m/s over 80m.

Answer 3

It is given that initial velocity of 25m/s.
It is given that the distance it has moved = 0.8 m
It is given that the final speed is zero.

These three is enough to find the acceleration.

Only thing needed is an equation connecting acceleration and any of these quantities.

We know V^2 = U^2 + 2as.
V= 0, U = 25 and s = 0.8m .
Find a.

Mass is not needed to calculate a.

Answer 4

T = rigidity rigidity is a stress in Newtons this question bargains with obvious weight while the elevator strikes up the equation is a s follows T = mass*gravity + mass* acceleration = 20910 Newtons