Practice Problems
Practice Problems
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 1. A force of 20 N acts upon a 5 kg block.  Calculate the acceleration of the object.   ans0401 (35.0K) 2. An object of mass 300 kg is observed to accelerate at the rate of 4 m/s2.  Calculate the force required to produce this acceleration.    ans0402 (34.0K) 3. A 5 kg block is pulled across a table by a horizontal force of 40 N with a frictional force of 8 N opposing the motion.  Calculate the acceleration of the object.   ans0403 (39.0K) 4. An object of mass 30 kg is in free fall in a vacuum where there is no air resistance. Determine the acceleration of the object.   ans0404 (31.0K) 5. An object of mass 30 kg is falling in air and experiences a force due to air resistance of 50 newtons.  Determine the net force acting on the object and calculate the acceleration of the object.   ans0405 (39.0K) 6. A student pushes on a crate with a force of 100 N directed to the right.  What force does the crate exert on the student?   ans0406 (29.0K) 7. A force of 200 N is exerted on an object of mass 40 kg that is located on a sheet of perfectly smooth ice.Calculate the acceleration of the object.  If a second object identical to the first object is placed on top of the first object, what acceleration would the 200 N force produce?   ans0407 (37.0K) 8. Just before opening her parachute a skydiver of mass 50 kg reaches terminal velocity. Calculate  the force of air resistance.   ans0408 (36.0K) 9. For a person who has a mass 60 kg, calculate the weight in newtons and in pounds.   ans0409 (37.0K) 10. An object of mass 10 kg is accelerated upward at 2 m/s2.  What force is required?   ans0410 (42.0K)