Question

In: Physics

A net force of 64 N acts on a mass of 16 kg. find the resulting...

  1. A net force of 64 N acts on a mass of 16 kg. find the resulting acceleration?

(Ans: F=ma, a=4)

  1. An object has an acceleration of 3.0 m/s2 when the only force acting on it is F0. (a) What is its acceleration when this force is doubled? Explain (Ans: 6 m/s2)

  1. The mass of a body that weighs 2.00 N at sea level  is?

(Ans: F=mg, m= 0.204)

  1. The acceleration due to gravity on the moon is only about 1/6 of that on earth. An astronaut whose weight on earth is 600 N travels to the lunar surface. His mass as measured on the moon is?

(Ans: 61.2 kg )

  1. Find the weight of a 54-kg student?

Ans: 530N

  1. If a force F is required to extend a spring by 20 cm, what force is required to extend it by 30 cm?   

(Ans: 3/2 F)

  1. To drag a 75.0-kg log along the ground at constant velocity, your tractor has to pull it with a horizontal force of 250 N. (a) Draw the free body diagram of the log. (b) Use Newton’s laws to determine the force of friction on the log. (c) What is the normal force of the ground on the log? (d) What horizontal force must you exert if you want to give the log an acceleration of 2.00 m/s2 assuming the force of friction does not change. Redraw the log’s free body diagram for this situation.

  1. A lamp with a mass of 42.6 kg is hanging from wires. Find the tension T1 in the vertical wire?

Ans: 418N

  1. A large box whose mass is 20.0 kg rests on a frictionless floor. A mover pushes on the box with a force of 250 N at an angle 35.0º below the horizontal. Draw the box’s free body diagram and use it to determine the acceleration of the box.

Ans: 10.2 m/s2

Solutions

Expert Solution

genius_generous answered 2 years ago
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