Tuesday

September 16, 2014

September 16, 2014

Posted by **tiffany** on Thursday, September 30, 2010 at 10:53pm.

(a) What is the greatest mass of groceries that can be lifted safely with this bag, given that the bag is raised with constant speed? kg

(b) What if it is raised with an acceleration of 1.25 m/s2? kg

- physics -
**Gregorius**, Sunday, October 3, 2010 at 7:12pmWell tiffany, you use this equasion: F=ma+mg. Manipulate the formula to get mass (which is the unknown here) on one side:

f= ma+mg

FACTOR m

f=m(a+g)

DIVIDE BOTH SIDES BY (a+g)

f/(a+g)=m

This can be used for both parts of the equasion. (remember that g=9.81 m/s^2.)

a)Since the bag is lifted with constant acceleration, "a" can be ignored. So:

f/g=m m=59/9.81= 6.01kg

b)for this part just don't ignore the acceleration. plug 1.25m/s into the formula.

m=f/(a+g) m=59/(1.25+9.81)= 5.33kg

**Answer this Question**

**Related Questions**

Physics - Your groceries are in a bag with paper handles. The handles will tear ...

physics - Your groceries are in a bag with paper handles. The handles will tear...

Physics - A student pushes stright along the handles of a mower with a force of...

science - why are plastic handles on frying pans safer to than metal handles

physics (clear answer) - The wheels, axle, and handles of a wheelbarrow weigh W...

phyics - The wheels, axle, and handles of a wheelbarrow weigh W = 53 N. The load...

Application problem - A wheelbarrow maker uses handles made of hardwood. Find ...

Math - A cafe holds 300 coffee mugs. 175 of those coffee mugs do not have ...

physics - Suppose you carry a bag of groceries weighing 127 N from your car to ...

statistics - The company policy for customer service representatives gives time ...