# Glencoe Science Level Red

## Chapter 5: Motion, Forces, and Simple Machines

### Section 1 Self-Check Quiz-Eng.

 1. Average speed is found by __________. Need a Hint? A) dividing the displacement by the time spent B) dividing total distance traveled by the travel time C) multiplying total distance traveled by the total time D) multiplying the displacement by the time spent 2. __________ is the speed of an object at any instant of time. Need a Hint? A) Average speed B) Velocity C) Instantaneous speed D) Acceleration 3. A bicycle rider travels 15 km in 1.25 hours. What is the rider's average speed? Need a Hint? A) 22.5 km/h B) 12 km/h C) 13.75 km/h D) 10.5 km/h 4. If a student leaves home at 7:30 A.M. to walk to his school 2 km away, stops at a neighbor's house for 15 minutes, then arrives at school at 8:00 A.M., what is the student's average speed for the trip to school? Need a Hint? A) 4 km/h B) 2 km/h C) 2.67 km/h D) 8 km/h 5. If a runner maintains a constant speed of 12 km/h, how long will it take him to complete a marathon race of 26.2 miles? Need a Hint? A) 2.18 h B) 3.14 h C) 5.3 h D) 3.52 h 6. The direction and speed of an object is described by its __________. Need a Hint? A) velocity B) displacement C) average speed D) average displacement 7. _________ is the change in velocity divided by the time needed for the change to occur. Need a Hint? A) Acceleration B) Average velocity C) Speed D) Displacement 8. Which of the following is NOT an acceleration? Need a Hint? A) riding your bike straight down the street at a constant speed B) stopping your bike at an intersection C) slowing your bike ride so you can make it up a hill D) riding your bike faster when you head down a hill 9. If a car is traveling 100 km/h and comes to a stop in 3 min, what is the car's acceleration? Need a Hint? A) 0.15 m/s2 B) - 0.15 m/s2 C) - 0.56 m/s2 D) 0.56 m/s2