help with Physics homework...?

Kaylin H

New member
okay, I'm not exactly sure how to solve these problems:

1.) A bike travels at a constant speed of 4.0 m/s for 5.0 s. How far does it go?


2.) Light from the Sun reaches Earth in 8.3 min. The speed of light is 3.00 x 10^8 m/s. How far is Earth from the Sun?


3.) A car is moving down a street at 55 km/h. A child suddenly runs into the street. If it takes the driver 0.75 s to react and apply the brakes, how many meters will the car have moved before it begins to slow own.


10 points to the person that shows me how to find the answer, step-by-step and is descriptive.
:)
 
1) 4 * 5 = 20 metres

2) speed of light = 300000000 m/s, travels sun to earth in (8.3*60) = 498 seconds, 300000000*498 = 149400000000 metres

3) 55 km/h = 55000 m/h = 15 m/s, 15 * 0.75 = 11 metres
 
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