8.6A Unbalanced Force Calculation

A student pushes a table with 65 kilogram across a smooth floor with a 50 N net force. What is the acceleration of the bookshelf?

• 115 m/s²

• 1.3 m/s²

• 3250 m/s²

• 0.77 m/s²

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112.2

A basketball is at the rest on the floor. Which statement describes the best the forces acting on the basketball?

• The forces are unbalanced so no motion occurs.

• The forces are unbalanced so motion occurs.

• The forces are balanced so no motion occurs.

• The forces are balanced so motion occurs.

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112.2

The net force on a vehicle that is a rate of 1.2 m/s² is 1,500 newtons.  What is the mass of the vehicle to the nearest kilogram?

Mathematical Equivalence

ON

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112.2

A vehicle has a mass of 1200 kg. If this vehicle has a rate of 1.5 m/s², what is the net force on the vehicle to the nearest newton?

Mathematical Equivalence

ON

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112.2

A car with a mass of 1,500 kg comes through a traffic light to stop. If the vehicle is accelerating at -1.4 m/s², which force is the closet to the net force acting on the vehicle?

• -1,070

• -1,500

• -1800

• -2,100

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112.2

A ball is located at one end of a cart that is moving forward as shown. The cart stops suddenly.

 

According to Newton’s first law, what happens to the ball just after the box stops?

• Because of reaction, the ball continues rolling forward at the same speed.

• Because of inertia, the ball rolls forward at an increasing speed.

• Because of reaction, the ball rolls forward at an increasing speed.

• Because of inertia, the ball continues rolling forward at the same speed.

Match the following

• Balanced Forces

• Total amount of force on an object

• Constant

• When an object has no motion

• Net Force

• Motion that is not changing

• At rest

• Equal and opposite forces