Unit 11 - Forces, Motion and Newton's Laws

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A group of students is playing tug-of-war. The students on both sides of the rope are pulling with equal force so that the rope is not moving. This is an example of

• unbalanced forces
• balanced forces
• acceleration
• displacement

A firefighter feels the hose pushing backwards onto him as he uses it to put out a fire. What is the most likely cause of this?

• The hose material is very elastic.
• Since the hose is at rest, it tends to stay at rest.
• The force exerted on the water equals the mass of the water times its acceleration.
• The escaping water exerts an equal and opposite force on the hose.

If the same force is applied to each of the balls pictured below, which one will have the LEAST acceleration?

• A. m = 0.5kg
• B. m = 0.75kg
• C. m = 10 kg
• D. m = 73 kg

Which of the following is measured in Newtons?

• weight
• energy
• mass
• acceleration

The relationship among mass, force, and acceleration is explained by:

• The Law of conservation of momentum
• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law

According to Newton's Laws, for any object, the greater the force that's applied to it, the greater its __________ will be.

• Acceleration
• Inertia
• Gravity
• Size

The size of the gravitational force between two objects depends on their ____.

• frictional forces
• inertia
• masses and the distance between them
• speed and direction