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A car accelerates uniformly from 0 to 80 km/h in 15 seconds. What is the acceleration of the car in m/s? What is the position of the car by the time it reaches 80 km/hr?.

Sagot :

Answer:

= 2.5km

Explanation:

Given: acceleration of car is 80km/h

Time: 15 seconds

To find: Acceleration in m/s and distance covered by car in 15 sec.

Solution:

ACCELERATION = 80km/h

                           = 80×1000m       200

                             -----------------  =  ------   = m/sec

                             60 ×60 sec         9

TIME = 15 sec

DISTANCE              1

                  =  ut + -----  at²

                               2

here u=o, so,

S = 1/2 × at² = 1/2 × 200/9 × (15)²

S = 1/2 × 200/9 × 15 × 15 = 2500m

S = 2.5km. The position of the car the time it reaches 80 km/h is 2.5km.

Paki brainliest nman sige thank you