Sunday

March 1, 2015

March 1, 2015

Posted by **Rachel** on Thursday, October 28, 2010 at 11:54pm.

I need to know HOW to do it!

- physics -
**jai**, Friday, October 29, 2010 at 12:00amfirst, recall formula for Force:

F = ma

where m = mass in kg, and a = acceleration in m/(s^2)

then also recall the formula for acceleration,,

acceleration is change in velocity over time, thus:

a = (v - v0)/t

where v = final velocity in m/s

v0 = initial velocity in m/s

t = time in s

since you are you are given velocity and time, calculate for a first,, assuming the bike is initially at rest, v0 = 0:

a = (v - v0)/t

a = 20/15 = ? *solve this*

after that, substitute this to

F = ma

since you are also given the mass, you can solve for F.

hope this helps.

**Answer this Question**

**Related Questions**

physics - What force is required to accelerate a 90kg bike to 20 m/s in 15 sec? ...

physics - there are 3 parts to my question. i need help on the last part. 1.a. A...

Physics - How much force is required to accelerate 5kg at 15m/sec?

Physics - Sukey is riding her bicycle when she sees a fallen tree 42 m ahead. If...

Physics - A 60kg biker on a 20kg bike exerts 600W of power to accelerate from 1m...

mechanical engineering - how much is the net force required to accelerate 1000kg...

physics - Need equation: Mass of 4.24 kg acted on by external force that reduces...

physics- please help - World-class sprinters can accelerate out of the starting ...

Physics - A bike is hanging from a hook in a garage. You need to consider the ...

Physics - A bike is hanging from a hook in a garage. You need to consider the ...