1. A force of 200 N is applied to a 50-kg mass in the direction of motion for a
ID: 1291539 • Letter: 1
Question
1. A force of 200 N is applied to a 50-kg mass in the direction of motion for a distance of 6.0 m and then the force is increased to 300 N for the next 5.0 m. For the 11 m of travel, how much work the varying force has done. 2. Two blocks are released from the top of a building. One falls straight down while the other slides down a smooth ramp. If all friction is ignored, which one is moving faster when it reaches the bottom? The block that went straight down. The block that went down the ramp. They both will have the same speed. Insufficient information to work out the problem.Explanation / Answer
Answer 1 : work done for first 5m = F.S = 200 * 5 = 1000 J
work done for next 6m = F.S = 300 * 6 = 1800 J
Total work done = 1000 + 1800 = 2800 J ANS
Answer 2: Both will have the same speed
Because in both cases initial velocity is zero and accelaration is g acting downwards
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