State the nature of work done in the following cases giving justification for eacha) When a truck moves on a road the work done by frictionb. workdone in pushing a heavy fixed rock?c.workdone by a force in lifting a heavy book from a table? Share with your friends Share 1 Aditi answered this a) Negative b) Zero c) Positive. -1 View Full Answer Parita Rakesh Dave answered this a) when a truck moves on a road the direction of displacement and force applied are opposite so the work done is negative. 2
