Question

a force of 20n acts on a body of mass 10kg for 10s find the change in momentum​

Answer 1

Answer:

If a force of 20 n acts on body of mass 10kg for 10s body can act first the body will speed of a motion this change in momentum

Answer 2

Question :-

A force of 20N acts on a body of mass 10kg for 10s.

Given :-

Force F = 20N

Mass M = 10kg

Time t = 10s

Initial Velocity u = 0 m/s

Final Velocity v = 0 m/s

To find :-

Change in Momentum ∆p

Solution :-

Step 1: Acceleration calculation

Applying Newton's second law

∑F=ma

⇒F=ma

⇒10(N)=20(kg) a

⇒a=0.5m/s

Step 2: Final speed

Since acceleration is constant,

∴ Applying equation of motion

v=u+at

u = Initial speed =0

v = Final speed

v=0+0.5(m/s²)×10(s)

=5m/s

Step 3: Change in momentum Δp

ΔP=m(v−u)

=20(5−0)kgm/s

=100kgm/s

Alternate solution :-

Impulse J = Force×time

=10(N)10(S)

=100NS

Impulse J = Δp

Δp = 100kgm/s