Question

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Answer 1

Answer:

if the final velocity is 7×10(6) MS then the time taken will be 76 minutes.

Step-by-step explanation:

because 7×10 = 70 and 70+6= 76

Answer 2

Answer: t = 6.67 * 10 ^-9 s and  0.04 m

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Step-by-step explanation:

Given,

a = 3* 10^14 m/s^2

u = 5*10^6 m/s

v = 7*10^6 m/s

t =?

s=?

Now, a=( v-u )/t

3* 10^14  = (7*10^6 -  5*10^6 ) /t

or, t = 2*10^6 /  3* 10^14

∴ t = 6.67 * 10 ^-9 s  

Now, s = ut +1/2 at^2

=  5*10^6 *6.67 * 10 ^-9  +1/2  *3* 10^14 * ( 6.67 * 10 ^-9 ) ^2

= 0.04 m