Exam 4: Forces and Motion I: Newtons Laws

A boy sits in a tire that is attached to a rope that passes over a pulley fastened to the ceiling and then passes back down to the boy's hands. The weight of the boy plus the tire is W. The force with which the boy must pull on the free end of the rope to support his weight in the tire is

If you want the same acceleration with masses M and 4M, the force applied on the mass M is

A cricket batsman hits a ball with a bat. If the force with which the bat hits the ball is considered the action force, what is the reaction force?

A lamp with a mass m is suspended from the ceiling by two cords as shown. The ratio of the magnitude of the horizontal component of the tension in to that in is

A 10-N force is applied to mass M. The same force is applied to mass 4M. The ratio of the acceleration of the smaller mass to the acceleration of the larger mass is

A body of weight w is in free fall near the surface of Earth. What force does the body exert on the Earth?

A particle of mass 1.3 kg is sliding down a frictionless slope inclined at 30^o to the horizontal. The acceleration of the particle down the slope is

Two masses, m₁ and m₂, connected by a massless string, are accelerated uniformly on a frictionless surface as shown. The ratio of the magnitude of tensions is given by

If force in N), length in m), and time in s) were considered to be the fundamental quantities, the units of mass would be

A force F produces an acceleration a on an object of mass m. A force 3F is exerted on a second object, and an acceleration 8a results. What is the mass of the second object?

The weight of an object is

A person of weight w is in an upward-moving elevator when the cable suddenly breaks. What is the person's apparent weight immediately after the elevator starts to fall?

An object is moving to the right at a constant speed. Which one of the following statements must be correct?

When Newton's first law of motion is mentioned, you should immediately think of

Three forces, , , and , act on a mass of 4.2 kg. The forces are = 2.0 N acting to the east, = 5.0 N acting 45^o to the north of east, and = 4.0 N acting 30^o to the north of west.The magnitude of the net acceleration of the mass is

A car is accelerating horizontally at a rate of 2.5 m/s². A mass of 250 g is hanging from the ceiling on a string 1.2 m long. The angle that the string makes with the vertical is

Which of the following is not a unit of force?

Which of the following statements includes all the essential elements of Newton's first law?

Which of the following free-body diagrams represents the car going uphill at a constant speed?

A mass m is traveling at an initial speed of 25.0 m/s. It is brought to rest in a distance of 62.5 m by a net force of 15.0 N. The mass is