A body starts from rest and accelerates uniformly at 5ms-1 until it attains a velocity of 25ms-1. Calculate the time taken to attain this velocity
A. 2.5s B. 5.0s C. 10.0s D. 125.0s Correct Answer: Option B B. 5.0s Explanation V = u + at = 25 = 0 + 5t t = 5sWhich of the following type of motion does a body undergo when acted upon by a couple?
A. vibrational B. translational C. rotational D. random Correct Answer: Option C C. rotationalMasses, m¹ and m² at the 20-cm and 65-cm marks respectively of a uniform metre rule freely suspended at its centre of gravity. If the metre rule balances horizontally, determine the ratio m²: m¹
A. 2 : 1 B. 3 : 3 C. 2 : 3 D. 1 : 2 Correct Answer: Option D D. 1 : 2A wheel and axle of radii 800mm and 200mm respectively is used to raise a body of weight 800N by the application of 250N. Calculate the efficiency of the machine
A. 85% B. 80% C. 60% D. 20% Correct Answer: Option B B. 80%Which of the following simple machines is a second class lever?
A. wheelbarrow B. crowbar C. claw hammer D. seesaw Correct Answer: Option A A. wheelbarrowProducts
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