Question

solve the following numerical with explaination ​

Answer 1

Answer:

1. -10⁵N

2. 10^-4 sec

Explanation:

Given :

m = 10g

u = 10³m/s

v = 0m/s

s = 5cm = 0.05m

To Find :

f = ?

t = ?

Formula :

1. v = u²+2as

2. F = ma

3. v = u+at

Solution :

1. v = u²+2as

--›› a = v²-u²/2a

--›› a = 0²-(10³)²/2×0.05

--›› a = -10⁵/0.1

--›› a = -10⁷

Deceleration of the bullet = 10⁷m/s²

So, the resistive force excerted by the sand on the bullet is = {0.1×(-10⁷)} = -10⁵N

2. We get that the acceleration is = -10⁷N

v = u+at

--›› 0 = 10³+(-10⁷)×t

--›› t = 10³/10⁷

--›› t = 10^-4

So, required time is 10^-4 sec.