Can you give me the answers to these 2 phsyics questions?

Question

1. A mass of 50 g is whirled in a circle of radius 45 cm. The circle is in a horizontal plane. Calculate the speed of the mass if the tension in the thread is 0.35 N. ( Tension provides the centripetal force )

2. A car of mass 1500 kg accelerates uniformly from rest to 23 m/s in 9.4 s. Calculate the average resultant force acting on the car and the distance covered during this time.

Answer 1

1. mv^2/r=T

i.e.

v^2=.35*.45/.05=3.15

i.e.

v=1.778

2.acceleration of car= -23/9.4= -2.45

so resultant force=mass*acc.=3675

acc. to third law of motion

v^2=u^2+2as

so distance covered=108 metres