5. Steve's older brother got this cool new car. He said it can go from a stopped position to 80 miles per hour in ten seconds. His brother is describing the car's
A. acceleration. ***
B. average velocity.
C. instantaneous speed.
D. average speed.
6. Radar devices are used by law enforcement to be sure that individuals are driving safely. They tell the officer how fast the vehicle is traveling at that specific moment in time. The radar device determines the vehicle's
A. instantaneous speed. *** B.acceleration.
C. maximum velocity.
D. average speed.
7. You run to your girlfriend's house and announce that you were running at a rate of 15 miles per hour. She knows this is not true because she knows
A. how far it is and in what direction.
B. the direction you traveled and how long it took you to get there.
C. when you left and when you arrived.
D. how long it took you to get there and the distance between your house and hers. ***
8. In order to determine the velocity, you must know
A. the distance and the time.
B. the direction and speed. ***
C. the time and speed.
D. the direction and time.
I agree with them all.
For number 6 is the correct answer A? I know on there it looks like I have it as choice B but I meant to put it on A.
A is correct, and I assumed you meant A and just forgot to hit Enter.
Yes that is exactly what happened. Thanks Damon.
1.) A
2.) A
3.) D
4.) B
These are correct
5. The correct answer is A. acceleration. To determine the car's acceleration, you need to calculate the change in velocity divided by the time taken. In this case, the change in velocity is from a stopped position to 80 miles per hour, which takes ten seconds.
6. The correct answer is A. instantaneous speed. Radar devices measure the speed of a vehicle at a specific moment in time, giving the officer the vehicle's instantaneous speed.
7. The correct answer is D. how long it took you to get there and the distance between your house and hers. If your girlfriend knows the time it took you to get to her house and the distance between your house and hers, she can calculate your average speed. If your claimed speed of 15 miles per hour is inconsistent with the time and distance, she can determine that you were not running at that speed.
8. The correct answer is B. the direction and speed. Velocity is a vector quantity that includes both magnitude (speed) and direction. To determine the velocity of an object, you need to know both the speed and the direction of its motion.