Ch 2 TEST REVIEW Physics

Aristotle classified motion into

• 2 kinds: Natural and Unnatural

• several distinct categories.

• pushes and pulls

• earth, air, fire, and water.

Science greatly advanced when Galileo favored

• philosophical discussions over experiment.

• experiment over philosophical discussions.

• non-mathematical thinking.

• none of these.

Galileo said that if you rolled a ball along a level surface it would

• soon slow down due to its natural tendency to come to rest.

• keep rolling without slowing if no friction acted upon it.

• roll as long as its inertia nudged it along.

• soon roll in the opposite direction.

Nellie runs the length of a 100-yard football field in a time of 50 seconds. Her average running speed is

• 1/2 yard/s.

• 2 yards/s.

• 5 yards/s.

• no way to say.

Your average speed in skateboarding to your friend’s house is 5 mi/h. It is possible that your instantaneous speed at some point was

• less than 5 mi/h.

• 5 mi/h.

• more than 5 mi/h.

• any of these.

Which of these is NOT a vector quantity?

• Speed

• Velocity

• Force

• Acceleration

• All are vector quantities

Sophia runs along the aisle of a train car that moves at 10 m/s. Sophia’s speed relative to the floor is 2 m/s. Her speed relative to an observer at rest on the ground is

• 2 m/s.

• 8 m/s.

• 12 m/s.

• either 12 m/s or 8 m/s depending on whether she runs in the same or opposite direction to the train’s motion.

• 10 m/s.

You’re at rest in a hammock when a hungry mosquito sees an opportunity for lunch. A 4 m/s wind is blowing. In order for the mosquito to land on you it should hover over you while flying

• against the wind at 4 m/s.

• with the wind at 4 m/s.

• a bit faster than 4 m/s.

• about 8 m/s relative to the wind.

When you walk at an average speed of 2 m/s, in 50 s you’ll cover a distance of

• 2 m

• 10 m

• 25 m

• 100 m

Your speed at the present time is about 30 km/s relative to the

• center of the Earth.

• Sun.

• center of the galaxy.

• person measuring it.