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A rocket is traveling through the atmosphere at a constant velocity. Which of the following is true?

• The rocket's engine is producing an unbalanced force that keeps the rocket in the air.

• All of the forces acting on the rocket are balanced.

• The rocket exerts a greater force on its exhaust gases than the exhaust gases exert on the rocket.

• The rocket is moving, so some net force must be acting on it.

Use the picture to answer the following question about a game of tug of war on field day:

• The forces are balanced, so the rope does not move.

• The forces are unbalanced and the rope moves to the left.

• The forces are unbalanced and the rope moves to the right.

• The forces are unbalanced and the rope does not move.

The full shopping cart has a mass of 75 kg and an empty one has a mass of 20kg. How much force would you need to accelerate the empty cart?

• We would need the same amount of force.

• We would need less force.

• We would need more force.

• We would not need force at all.

Which statement is a valid description and explanation of the guy’s motion based on evidence from the diagram.

• The fridge’s force is balanced due to the overall forces of gravity and friction being less than then the force of the push.

• The fridge’s force is unbalanced due to amount of push not equaling the amount of gravity.

• The fridge’s force is balanced due to the amount force exerted by the freezer and friction thus equaling to the force of push.

• The fridge’s force is unbalanced due to the larger amount push force being exerted compared to the smaller amount of frictional force.

What two measurements are necessary for calculating speed?

• Mass and time
• Temperature and mass
• Mass and distance
• Distance and time

Can be measured in seconds (s)

• Distance
• Time
• Speed
• Acceleration

Can be measured in meters (m)

• Distance
• Time
• Speed
• Acceleration

What is the formula to calculate speed?

• s = t/d

• s = d/t

• s = d x t

• s= t x d

Calculate the speed of the runner represented by the DOTTED line in Graph A.

• 2.5 yd/sec

• 5 yd/sec

• 2.5 sec

• 4 sec

Calculate the speed of the runner represented by the SOLID line in Graph A.

• 2.5 yd/sec

• 5 yd/sec

• 2.5 sec

• 4 sec