Posted by **Nicole** on Friday, October 15, 2010 at 7:13pm.

A 25kg mass is on a level, rough surface where the force of friction is a constant 15 N. A horizontal applied force of 65 N acts on the mass. The mass is initially at rest.

a) what speed does the mass have after 4.0 seconds?

b) what speed does the mass have after being moved 2.0m?

- Help me please with physics -
**bobpursley**, Friday, October 15, 2010 at 7:14pm
force pulled-friction= ma

start with that, solve for a.

- Help me please with physics -
**Nicole**, Friday, October 15, 2010 at 7:20pm
Fnet=65-15=0?

50 is the answer?

- Help me please with physics -
**Nicole**, Friday, October 15, 2010 at 7:54pm
I got finally got letter a but im stuck at b now :(

- Help me please with physics -
**bobpursley**, Friday, October 15, 2010 at 8:43pm
if you have a...

Vf^2=Vi^2+2ad

Vi is zero, you know a, and d. solve for Vf

## Answer This Question

## Related Questions

- Physics - A 25 kg mass is on a level, rough surface where the force of friction ...
- Physics - A 25 kg mass is on a level, rough surface where the force of friction ...
- Physics - A force of 20N is applied to a mass of 5kg resting on a rough ...
- Physics - help please! - A 20 kg mass is at rest on a level surface where the ...
- physics - A mass is pushed over a surface by a 19 N force that acts somewhat ...
- physics - A horizontal force of 20 N acted on a 10 kg mass at rest. The force ...
- physics - a force F pushes on a box of mass m that initially is at rest on a ...
- college physics - A man pushing a crate of mass m = 92.0 kg at a speed of v = 0....
- Physics - 1- A mass m is pushed against a spring of spring constant k = 12000 N/...
- Physics - A force of 20 N is applied horizontally to a 1 kg mass on a level ...

More Related Questions