Here are some muliple choice questions I am stuck on. Thanks in advance for help any one can give me.
1) A falling object that has reached its terminal speed continues to gain?
a.speed
b.both speed and acceleration
c.acceleration
d.neither speed nor acceleration.
I think the answer is D because once and object reaches terminal speed nothing changes...
2)A car travels 30 meters in 5 seconds. What is its average speed?
a.6 m/s
b.25 m/s
c.35 m/s
d.150 m/s
3)It takes 6 seconds for a stone dropped from rest to hit the botom of a well. What is its final speed?
a.6 meters/second
b.30 meters/second
c.36 meters/second
d.60 meters/second.
1. you are correct
2. average speed = distance/time
3. speed = acceleration x time
so #2 is A and #3 is D?
Thanks so much :)
correct!!
That's correct! For question 2, the formula to find average speed is distance divided by time. In this case, the car traveled 30 meters in 5 seconds, so the average speed would be 30 meters divided by 5 seconds, which equals 6 meters per second. Therefore, the answer is A.
For question 3, the formula to find speed is acceleration multiplied by time. Since the stone is dropped from rest, its initial velocity is 0. The acceleration due to gravity is approximately 9.8 meters per second squared. Given that it takes 6 seconds for the stone to hit the bottom of the well, the final speed can be calculated by multiplying the acceleration (9.8 m/s²) by the time (6 seconds), resulting in 58.8 meters per second. Rounded to the nearest whole number, the final speed is 59 meters per second. Therefore, the answer is D.
Well done! Let me know if you have any further questions.