PHYSICS HIGH SCHOOL

If a car can go from 0.0 to 60.0 mi/hr in 8.0 seconds, what would be its final speed after 5.0 seconds if its starting speed were 50.0 mi/hr?

Answers

Answer 1

Answer:

87.5 mi/hr

Explanation:

The formula is A=Vf-Vi / t.

Answer 2

Answer:

Final answer:

The final speed of the car after 5.0 seconds, given a starting speed of 50 mi/hr and an acceleration of 7.5 mi/hr/s, would be 87.5 mi/hr.

Explanation:

This problem involves calculating the final speed of a moving object given its initial speed, acceleration and time. Acceleration is defined as the change in velocity divided by the time taken(s). Given that the car accelerates from 0 to 60 mi/hr in 8 seconds, it means its acceleration is (60mi/hr - 0mi/hr) / 8s = 7.5 mi/hr/s. Now, if the car's starting speed were 50mi/hr, its final speed after 5.0 seconds would be calculating using the formula Final Speed = Initial Speed + (Acceleration * Time). Plugging in our values we get Final Speed = 50mi/hr + 7.5mi/hr/s * 5s = 87.5 mi/hr.

Learn more about Acceleration and Final Speed here:

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Answers

18 km/hr*1000m/km*1 hr/3600 sec= 5 m/sec

85 km/hr= 23.6 m/s

distance = 4000m

distance= initial distance+initial velocity*time+ 1/2 acceleration*time^2

initial distance=0

4000= 5.0*t+ 1/2 (accel)(time)^2

Velocity=initial velocity+ acceleration * time

23.6 m/s= 5.0 m/s+ acceleration * time

We now have two equations and two unknowns. Solve them and you have your answer.

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Answers

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Answers

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Answers

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There are no values on the list of choices you've provided that are even close.

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Answers

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I'd expect it to be 10.4s, because as we said earlier 10m = 1s, so 4m would equal 0.4s
Hopefully that helps you, I know the answers aren't of the best quality (I know I'm not particularly happy with some of them), but that's the best I can do for you on short-notice :)

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Answers

111.0 because 111.009 rounds off to 111.01, thus rounding again off to 111.0

Answer:

It is b. 111.0 mm

Explanation:

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