The Great Quizz II

Increasing which of the following forces will always result in an increase in the size of the friction force upon a moving body?

• Normal force

• Tension

• Weight

• Applied force

What are the units of force?

• Kilopounds

• Kilograms

• Joules

• Newtons

Luis has a mass of 79.62 kg. What is the magnitude of his mass on the Moon's surface?

• 79.62 N

• 781.07 kg

• 79.62 kg

• 781.07 N

Weight is a vector quantity

• True

• False

"The acceleration of an object is directly proportional to the external force applied and inversely proportional to the object's mass". This statement corresponds to which of Newton's Laws?

• First Law

• Second Law

• Third Law

• Law of inertia

In the following free body diagram of a moving block, identify which force is represented by the arrow labelled D:

• Static friction force

• Kinetic friction force

• Weight

• Normal force

An object with a mass of 300 kg is being pulled by a force of 2000 N. If the object moved a distance of 3 m, what is work done by the weight?

• 0 J

• 0 N

• 6000 N

• 6000 J

An object with a mass of 2 kg is placed 3 m above the ground. A table with height of 1 m is placed near the object. What is the potential energy of the object in relation to the table?

• 58.86 J

• 39.24 J

• It has no potential energy

A car witha mass of 1000 kg is traveling at a speed of 30 m/s. What is the kinetic energy of the car?

• 450000 J

• 450000 N

• It has no kinetic energy

A watermelon is sitting at the top of a building and then is dropped. If the watermelon has a mass of 3 kg and the building has a height of 40 m, what is the kinetic energy of the fruit before it touches the ground?

• More information is required

• 1177.2 N

• 1177.2 J

• 1179 J