Science Quiz 8

Which of these is an example of deceleration?

• A man running at a constant speed

• A roller coaster moving down a steep hill

• A car slows down at a red light

Which of these is an example of acceleration?

• A man running at a constant speed

• A roller coaster moving down a steep hill

• A car slows down at a red light

An object with more particles will have more, what?

• Condensation

• Radiation

• Thermal energy

Which heat transfer happens in empty space?

• Radiation

• Conduction

• Heat

What is the acceleration of the ball between 0 and 3 seconds?

• 0 m/s²

• 1 m/s²

• 2 m/s²

A cyclist travels 32 km in 2 hours. What is the cyclist's average speed?

• 16 km/hr

• 32 km/hr

• 34 km/hr

A falling ball accelerates from 5 m/s to 25 m/s in 2 seconds. What is the ball's average acceleration?

• 20 m/s²

• 10 m/s²

• 30 m/s²

According to Newton's Second Law of Motion, an object's acceleration depends on the force applied to it and its;

• Velocity

• Position

• Mass

While a train is moving forward, a 25,000 N force acts on the train in the forward direction, and then an additional 26,000 N force acts in the opposite direction. What is the net force on the train?

• 51,000 N forward

• 25,500 N forward

• 1,000 N backward

You exert a force of 120 N to push a box down the hallway. Your friend helps by exerting a force of 150 N against the box in the same direction. Which net force do you and your friend exert on the box?

• 30 N

• 120 N

• 270 N