Answer to Question #292915 in Classical Mechanics for Vena

Classical Mechanics

Question #292915

How much work is done in lifting a 2-kg ball 0.5m high? Express your answer in a) joules and b) ergs.

Expert's answer

Solution

Mass of ball m=2kg

Height to lift h=0.5m

So work is done

a) W=mgh

$=2\times9.81\times0.5\\=9.81N$

b)1J=10⁷ ergs

Work done

$W=9.81\times10^7ergs.$

Learn more about our help with Assignments: Physics

Comments

No comments. Be the first!

Leave a comment

Related Questions

1. Block A rests on top of block Bas shown in (Figure 1). The table is frictionless but there is frict
2. A car of mass 1050 kg accelerates uniformly at 2.4 ms-2 from an initial speed of 10 ms-1. It travels
3. A 3kg object travels in a uniform circle at a constant speed of 12m/s. The centripetal force acting
4. A 3kg object travels in a uniform circle at a constant speed of 12m/s. The centripetal force acting
5. A bullet leaves the barrel of a gun at a speed or 320 m/s at an angle of 45 degrees above the horizo
6. Which of the following descriptions of an object is not equivalent to the others?A.the object is at
7. A car’s speed increases uniformly from 20.0 km/h to 60.0 km/h in 20.0 s.