Question

Pls answer this I have to submit to my teacher

Answer 1

Answer:

Explanation:

4) Acceleration = velocity/time

                         = (30/15)m/s2

                         = 2 m/s2

6) velocity = 72 km/h

=72000/3600 m/s

= 20 m/s

retardation=velocity/time=10m/s2

therefore, 20m/s/time=10 m/s2

therefore, time= 2s

7) velocity = displacement/time

= 360/5 km/hr

=72km/hr

= 20 m/s