1 A weightlifter lifts a weight of 2000 N a distance of 2.1 m from the...
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1 A weightlifter lifts a weight of 2000 N a distance of 2.1 m from the floor in 2.4 s. Calculate their average power. 2 A car of weight 1.5 x 104 N drives up a slope at a steady speed of 12 m s-1. The car gains 1.0 m of height for every 10 m travelled in the horizontal direction. Calculate the power of the engine. 3 An object of 10 kg is initially at rest when a horizontal resultant force of 30 N is applied to it for 4.0 s. Assuming frictional forces are negligible, calculate: a the distance travelled by the object b the work done on the object C the kinetic energy of the object at 4.0 s d the velocity of the object at 4.0 s. 1 A weightlifter lifts a weight of 2000 N a distance of 2.1 m from the floor in 2.4 s. Calculate their average power. 2 A car of weight 1.5 x 104 N drives up a slope at a steady speed of 12 m s-1. The car gains 1.0 m of height for every 10 m travelled in the horizontal direction. Calculate the power of the engine. 3 An object of 10 kg is initially at rest when a horizontal resultant force of 30 N is applied to it for 4.0 s. Assuming frictional forces are negligible, calculate: a the distance travelled by the object b the work done on the object C the kinetic energy of the object at 4.0 s d the velocity of the object at 4.0 s.
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