An astronaut moves in space with a constant speed. If he is far from the influence of gravity of any star or planet, what is the minimum force required in order for him to keep on moving? a) force equal to its weight b) force equal to its mass c) force depending on its speed d) zero

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A: Page 1

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A: Answer- (B) A box sliding on the floor slowly comes to a rest due to friction.

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A: Answer is Option (b) The expression for find magnitude of acceleration of the box is a=Fm

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A: Given data:  Normal force (FN) = 55 N Required: The mass (m)

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A: solution as

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A: F1= 138 N, 33.9 degrees north of west F2= 258 N, 43.3 degrees east of south mass = m = 0.42 kg

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Newton’s Third Law of Motion

The horse pulls the cart and the cart pulls the horse in response as per Newton third law. So the big question is, “Don’t the two forces cancel each other? How does the cart accelerate?”