# Physics

posted by
**Cori Smith** on
.

A mass M is initially at rest on a horizontal surface, μs=0.30 and μk=0.20 . A horizontal string then pulls M with a tension T. N is the normal component of the contact force. All quantities below are magnitudes. Answers are either true or false.

1)The total force on M is μkN if M remains at rest.

2)If M does not accelerate, then T ≤ μsN

3)M will accelerate if T exceeds μkN

4)T equals μkN if M remains at rest.

5)The value of N equals Mg

6)M will accelerate if T exceed μsN