# A horizontal force of 100 N is applied a block solve this

1. Sep 22, 2015

### wein7145

1. The problem statement, all variables and given/known data
1) A block lies on a horizontal friction-less surface. A horizontal force of 100 N is applied to the block giving rise to an acceleration of 3m/s^2.

(a) Determine the mass of the block.
b)Calculate the distance the block will travel if the force is applied for 10s.
c)Calculate the speed of the block after the force has been applied for 10s.

2. Relevant equations
Force=mass*(acceleration)
distance = 1/2*a*t^2
velocity = a*t

3. The attempt at a solution
a) I'm pretty sure it's just Force/accel =mass so 100N/3m/s^2=33.33kg (Edit kg not N)
b) distance = 1/2*a*t^2 = 1/2*3 m/s^2 * (10s)^2 = 150 m
c) velocity = a*t = 3 m/s^2 * 10s = 30 m/s
Just check over my work. At least I feel like I'm learning something this week.

Last edited: Sep 22, 2015
2. Sep 22, 2015

### SteamKing

Staff Emeritus
In a) the units of mass are not newtons.

3. Sep 22, 2015

### wein7145

Whoops your right they are kg (Kilograms) But does everything else look good?

4. Sep 22, 2015

### SteamKing

Staff Emeritus
Yes, everything else seems to be OK.