What is the minimum average speed needed for a car to qualify in a drag race?

AI Thread Summary
To qualify for a drag race, a car must average 254 km/hr over a 1600-meter track. The first half of the track is covered at 227.5 km/hr, taking approximately 12.6 seconds. To determine the minimum average speed required for the second half, the total time for the entire track must be calculated based on the required average speed. The total time allowed for the 1600 meters at 254 km/hr is about 18.9 seconds. Therefore, the car must complete the second half in less than 6.3 seconds to qualify.
hannah2329
Messages
12
Reaction score
0

Homework Statement



to qualify for a race a car must achieve an average speed of 254 km/hr on a track 1600 meters long. if a car covers half the track with an average speed of 227.5 km/hr what minimum average speed must it have the second half to qualify?

Homework Equations


speed=distance/time


The Attempt at a Solution


my teacher told us to find the time it took for the first half and i did that by converting 227.5km/hr and getting 63.19m/s=800/t and got 12.6 seconds for the first half. he told us we could use this to solve the problem but I am really confused on how to do that.
 
Physics news on Phys.org
If the average speed must be 254 km/hr for the 1600 m trip, what must be the total time for the trip?
 
thank you! i got it right!
 
Thread 'Voltmeter readings for this circuit with switches'

Thread 'Voltmeter readings for this circuit with switches'

TL;DR Summary: I would like to know the voltmeter readings on the two resistors separately in the picture in the following cases , When one of the keys is closed When both of them are opened (Knowing that the battery has negligible internal resistance) My thoughts for the first case , one of them must be 12 volt while the other is 0 The second case we'll I think both voltmeter readings should be 12 volt since they are both parallel to the battery and they involve the key within what the...
View full post »
Thread 'Correct statement about a reservoir with an outlet pipe'

Thread 'Correct statement about a reservoir with an outlet pipe'

The answer to this question is statements (ii) and (iv) are correct. (i) This is FALSE because the speed of water in the tap is greater than speed at the water surface (ii) I don't even understand this statement. What does the "seal" part have to do with water flowing out? Won't the water still flow out through the tap until the tank is empty whether the reservoir is sealed or not? (iii) In my opinion, this statement would be correct. Increasing the gravitational potential energy of the...
View full post »

Similar threads

What is the required speed for the last 2 laps to qualify for the race?
Replies
1
Views
2K
What Is the Average Angular Speed of a Race Car on a Circular Track?
Replies
1
Views
2K
Coriolis Force on a Race Car at 45 Degrees North
Replies
3
Views
2K
What is the Average Speed and Acceleration of a Car on a Straight Road?
Replies
45
Views
5K
Race Car Driver's Average speed
Replies
3
Views
10K
Race Car Scenario: Who will win?
Replies
11
Views
5K
Can anyone help with an average speed problem?
Replies
2
Views
1K
What are the average speed formulas needed to solve this problem?
Replies
5
Views
5K
What Minimum Speed is Needed to Qualify for a Race?
Replies
2
Views
2K
Problem Driver Must Average 337.5 km/h for Last 4 Laps
Replies
4
Views
2K

Hot Threads

Recent Insights

Back
Top