# Find out the speed of an object

1. Jan 26, 2016

### wapleman

1. The problem statement, all variables and given/known data
A 10.0 kg box is acted on by a constant force of 50.0 N. If it passes a first timer with a speed of 2.0 m/s and then travels 150 cm to a second timer, what would its speed be as it passes the second timer?

2. Relevant equations
I know usually to find out the speed of an object it is usually distance over time.
I know the distance being 150 cm
However as there is no time i've come to a complete stand still

3. The attempt at a solution
Stuck at the beginning, if someone would be kind enough to point me in the right direction please.

2. Jan 26, 2016

### haruspex

What equations do you know related to motion under constant acceleration?

3. Jan 26, 2016

### wapleman

Vf = Vi + at
If that helps at all.
I have the distance, just not the acceleration to use that equation

4. Jan 26, 2016

### haruspex

You should be familiar with the SUVAT equations if you are expected to solve a problem like this.
See e.g. https://en.m.wikipedia.org/wiki/Equations_of_motion#Uniform_acceleration.
As for the acceleration, you are given enough information to find it. Which of Newton's laws relates force to acceleration.