Newton's Second Law Answers

A sled is moving down a steep hill. The mass of the sled is 50 kg and the net force acting on it is 20 N. What must be done to find the acceleration of the sled? Check all that apply.The force of gravity must be broken into its parallel and perpendicular components.Acceleration can be found by dividing the net force by mass.Acceleration can be found by multiplying the net force by mass.The magnitude of the force components must be multiplied by gravity. Trigonometry can be used to solve for the magnitude of the force components.Net force must be found before acceleration can be found.

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Jake uses a fire extinguisher to put out a small fire. When he squeezes the handle, the flame retardant is released from the extinguisher with considerable force. As a result, Jake has to reinforce his grip on the extinguisher to hold it in place as it pushes back into his hands.

✔ extinguisher flame retardant fire

unequal to ✔ equal to the inverse of

equal to greater than ✔ less than

equal to ✔ greater than less than

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Two children are pulling and pushing a 30.0 kg sled. The child pulling the sled is exerting a force of 12.0 N at a 45o angle. The child pushing the sled is exerting a horizontal a force of 8.00 N. There is a force of friction of 5.00 N.

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A boy is exerting a force of 70 N at a 50-degree angle on a lawn mower. He is accelerating at 1.8 m/s2. Round the answers to the nearest whole number.

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extinguisher ✔ flame retardant fire