A 70 N force is applied horizontally to a 10kg block at rest for a displacement of 200 m across a frictionless surface. (a) How much work is done by the force? (b) What is the final kinetic energy? (c) How fast is the block moving? (d) What is the acceleration of the block in the horizontal direction? (e) Use kinematics to calculate the final speed of the block.
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- Work done (W) by a force is given by the formula W = F * d * cos(θ), where F is the force applied, d is the displacement, and θ is the angle between the force and the direction of displacement. Since the force is applied horizontally and the displacement is also Show more…
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