Midterm: Study Guide

Michaela walks 10km west to the grocery store, then walks back 10km east to go home. What are the total distance and displacement (with direction) for her trip?

• Distance: 20km, Displacement: 0km (no direction)

• Distance: 10km, Displacement: 10km west

• Distance: 20km, Displacement: 20km east

• Distance: 0km, Displacement: 20km west

What are the total distance traveled and the displacement (with direction) for Tyler if he drives 50 km north and then 30 km south?

• Distance: 80 km, Displacement: 20 km north

• Distance: 20 km, Displacement: 80 km south

• Distance: 80 km, Displacement: 20 km south

• Distance: 50 km, Displacement: 30 km north

Determine the distance and displacement for Josh who walks 4 km west and then 1 km east.

• Distance: 5 km, Displacement: 3 km west

• Distance: 3 km, Displacement: 5 km west

• Distance: 4 km, Displacement: 1 km east

• Distance: 5 km, Displacement: 1 km east

Madison runs around a track. Each lap is 400m. She runs two laps. What is the total distance Madison runs, and what is her displacement?

• Distance: 800m, Displacement: 0m

• Distance: 400m, Displacement: 400m

• Distance: 800m, Displacement: 800m

• Distance: 400m, Displacement: 0m

Determine the speed and velocity for Michaela's walk to the grocery store and back home, including the direction of the velocity.

• The speed is the total distance divided by time, and the velocity is zero because the displacement is zero (returns to starting point).

• The speed and velocity are both zero because Michaela returns home.

• The speed is zero, but the velocity is the total distance divided by time.

• The speed and velocity are both equal to the total distance divided by time, with velocity directed toward the store.

Determine the speed and velocity for Tyler who drives 50km north in 10 minutes and then drives 30 km south in 7 minutes. Also, find the direction of the velocity.

• Speed: 5 km/min, Velocity: 1.18 km/min south

• Speed: 4.71 km/min, Velocity: 1.18 km/min north

• Speed: 4.71 km/min, Velocity: 1.18 km/min south

• Speed: 5 km/min, Velocity: 1.18 km/min north

 Josh walks to get pizza for lunch. He walks 400 km west, realizes he passed the pizza place, and walks 100 km east. The trip takes him 20 minutes.

What is the total distance Josh walked and what is his average speed?

• Josh walked a total distance of 500 meters and his average speed was 0.4m/s.

• Josh walked a total distance of 200 meters and his average speed was 4 m/s.

• Josh walked a total distance of 300 meters and his average speed was 3 m/s.

• Josh walked a total distance of 400 meters and his average speed was 1 m/s.

Madison runs around a track. Each lap is 400m. She runs two laps, taking 90 seconds for each lap. What is her average speed?

• 8.89 m/s

• 4.44 m/s

• 6.67 m/s

• 2.22 m/s

The Law of Conservation of Energy states that:

• Energy cannot be created or destroyed, only transformed from one form to another.

• Energy can be created but not destroyed.

• Energy is always lost during transformations.

• Energy can only be destroyed, not created.

Gravitational Potential Energy: It is stored energy based on ________________________________

• position or height above the ground

• temperature of the object

• color of the object

• speed of the object