A racing car moving with constant acceleration covers two successive kms in 30sec
& 20sec respectively.What is the acceleration of the car?
2006-12-04 20:35:17 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Physics
60km/hour accelaration
2006-12-05 04:48:17 · answer #1 · answered by Anonymous · 0⤊ 0⤋
S = ut + 0.5 a t^2.
Let u be the initial velocity at the start of the first km.
Distances traveled in 30 seconds and 50 seconds respectively are
1km = 30 u + 450a------------------------1.
2km= 50u + 1250a-----------------------2.
Multiplying equation 1 by 50 and equation 2 by 30 and then subtracting one from the other,
1 km = 1500 a.
a = 1 / 1500 km/s or 0.67m/s^2.
2006-12-05 22:16:22 · answer #2 · answered by Pearlsawme 7 · 0⤊ 1⤋
i think 25 m/s square
2006-12-05 06:38:25 · answer #3 · answered by ambresh 2 · 0⤊ 1⤋