an 8g bullet is fired from a rifle.The bullet passes through a 10cm plank.This reduces the bullet's velocity from 400m/s west to 300m/s west
a. Calculate the bullet's initial momentum
b. calculate the bullet's final momentum
c. calculate the bullet's change in momentum
d. Draw a labelled diagram to illustrate the bullet's initial, final and change in momentum vectors
Answers
The acceleration force would be about 24000 N.
Given:
Mass of bullet(m)= 30g = 0.03kg.Initial velocity (u)= 400m/s.
To find: acceleration
Solution:
Displacement is outlined as the change available of an object. It is a heading size and has a management and size. It is presented as an missile that points from the offset position to the ending position. For example- If an object moves from A position to B, before the object’s position changes.
This change available of an object is famous as Displacement.Distance and dislocation are two quantities that appear to mean the alike but are clearly various accompanying various significations and definitions. Distance is the measure of “by what method much ground an object has enclosed all the while allure motion” while dislocation refers to the measure of “by virtue of what unusual of place is an object.” In this item, allow us believe the distinctness 'tween distance and dislocation
Mass of bullet(m)= 30g = 0.03kg.
Initial velocity (u)= 400m/s.
Final velocity (v)= 0m/s. [Since bullet comes to rest after penetrating 10 cm in wall]
Distance penetrated by bullet (S) or displacement of bullet in presence of resistive force = 10 cm = 0.1m.
Acceleration (a)=?
From third equation of motion:
The negative sign shows that acceleration takes place in direction opposite to the initial direction of motion of bullet or retardation takes place.
Here too negative sign shows that force applied by mud wall on bullet is in direction opposite to initial direction of motion of bullet.
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