Question

A body of mass 5 kg is moving with speed 144 km/h then its momentum is 2x10^x gr-cm/sec then find 'x'

Answer 1

Answer:

given: m = 5 kg, v = 144 km/hr

= 144*(5/18) m/sec

to find: x

formula used- M = m x v

M = 2×10ˣ gm-cm/sec

= (2×10ˣ)/(10³×10²) kg-m/sec

= 2×10⁽ˣ⁻⁵⁾kg-m/sec

=> 5×144×(5/18) = 2×10⁽ˣ⁻⁵⁾

=> 10⁽ˣ⁻⁵⁾ = (5 x 144 x 5) / 18 x 2

=> 10⁽ˣ⁻⁵⁾ = 5 x 4 x 5

=> 10⁽ˣ⁻⁵⁾ = 100

=> 10⁽ˣ⁻⁵⁾ = 10²

=> x-5 = 2 [ as base on both sides is same, equate the exponents]

=> x = 2+5

=> x = 7

Answer 2

Answer:

see the attachment

Explanation:

hope it helps you