Fall Final Review 2

• 7.2 m/s

• 10.0 m/s

• 4.47 m/s

• 21.8 m/s

A motorbike moves at a tangential speed of 18.0 m/s around a curve with a circular radius of 24.0 m. What is the centripetal acceleration of the motorbike?

• 9.0 m/s^2

• 13.5 m/s^2

• 18.0 m/s^2

• 24.0 m/s^2

Tags

NGSS.HS-PS2-1

A hiker walks 12 m west and 16 m north to reach a scenic viewpoint. What is the magnitude of her resultant displacement?

• 20 m

• 38 m

• 192 m

• 400 m

A cyclist rides 28 km south, then 30 km west. What is the magnitude of the total displacement, to the nearest tenth?

• 2.0 km

• 58 km

• 15.0 km

• 41.0 km

Starting from one shore, a student rows a boat across a narrow river to the shore on the other side. The river is 45.0 m wide. As the student rows, the river current causes the boat to move down the river a distance of 60.0 m. What is the resultant displacement of the boat?

• 15.0 m

• 55.0 m

• 75.0 m

• 105 m

A student walks straight across a park that is 30.0 m wide. Because of a winding path, she ends up 40.0 m to the side of her starting point. What is the magnitude of her resultant displacement?

• 50.0 m

• 70.0 m

• 25.0 m

• 35.0 m

Two vectors, a and b, are shown. Which of the following most likely represents a + b?

• Option A

• Option B

• Option C

• Option D

A skier moves 200 m down a slope and then 150 m horizontally to reach the lodge. What is the magnitude of the resultant displacement?

• 100 m

• 250 m

• 350 m

• 400 m

• 13.5 m/s^2

• 31.0 m/s^2

• 27.4 m/s^2

• 23.9 m/s^2

Tags

NGSS.HS-PS2-4

NGSS.HS-ESS1-4

NGSS.HS-PS2-1

Which TWO of the following statements correctly describe Kepler's Laws of Planetary Motion?

• Planets move in elliptical orbits with the Sun at one focus.

• A line from a planet to the Sun sweeps out equal areas in equal times.

• Planets move in perfect circles around the Sun at a constant speed.

• The force of gravity decreases with the square of the distance between objects.

• The mass of a planet determines the shape of its orbit around the Sun.

Tags

NGSS.HS-ESS1-4