4. A racing car has a uniform acceleration of 4 m s - '2. What distance will it cover in 10 s after start?

200 m

Explanation:

Initial velocity- 0

final velocity= v

time= 10 seconds

to find final velocity

v= u + at

v= 0 + 4*10

v= 0 + 40

v= 40 m/s

to find distance

s= ut + 1/2at²

s= 0*10 + 1/2*4*(10)²

s= 1/2 *4*100

s=200m

answer : 200 m

c) up is the direction the magnetic force is acting on the charge.

c because the news are a source of information of things that happen on the daily and shows evidence about that particular topic