1-D Kinematics EXTRA CREDIT
Please show your work as well as the answers. Make sure your answers have units and also a direction if it is a vector. Each correct question is 3 bonus points up to a maximum of 100 on the quiz.
For questions 1 and 2: A cart rolls 2 m to the right then rolls back 1 m to the left.
What is the total distance rolled by the cart?
The cart rolled 3 meters
What is the displacement of the cart from the initial to the final positions?
For questions 3 and 4: A child observes a caterpillar walking on a window sill. The caterpillar walks 18 cm to the left, then 6 cm to the right, then 10 cm to the left.
What is the total distance walked by the caterpillar?
34 cm
What is the displacement of the caterpillar?
The caterpillar’s displacement is 22 cm (left)
For questions 5 and 6: A ball is thrown upward from an initial height of 1.5 m. The ball reaches a height of 5 m then falls to the ground.
What is the total distance traveled by the ball?
Since the initial height must be a person standing 1.5 meters that means the actual amount traveled is only 3.5 meters in the air if we are not counting the 1.5 meters from the ground.
Displacement = 3.5 m
What is the displacement of the ball?
The displacement is 1.5m (west) because the ball started above the ground by 1.5m it made it so the displacement wouldn't be zero
A car travels a distance of 100 km in 2 hours. What is the average speed of the car (km/h)?
50 km/h
speed= distance/time
An NFL wide receiver prospect runs 40 m in 4.5 seconds. What is the average speed of the wide receiver (m/s)?
The average human walks at a speed of 5 km per hour. If your PE teacher asks you to walk for 30 minutes in gym class, how far would you walk (km)?
The posted speed limit on the road heading from your house to school is 45 mi/h, which is about 20 m/s. If you live 8 km (8,000 m) from school, how long will it take you to get to school if there is no traffic? Convert your answer to minutes.
For questions 11 and 12: A ladybug walks 10 cm forward then 5 cm backward in 20 seconds.
What is the average speed of the ladybug?
What is the average velocity of the ladybug?
A sports car accelerates from rest to 26.8 m/s (roughly 60 mi/h) in 5.1 seconds. What is the acceleration of the car?
One minute after takeoff, a rocket carrying the space shuttle into outer space reaches a speed of 447 m/s. What was the average acceleration of the rocket during that initial minute?
Classify the following measurements as vector or scalar quantities:
2.35 m, up
4.2 s
6.8 cm2
7.3 km/s, 30° N of E
