Advertisements
Advertisements
Question
A canon ball of mass 500g is fired with a speed of 15m/s-1. Find: its momentum.
Advertisements
Solution
Momentum of the ball = mass x velocity
= 0.5 x 15=7.5 kgm/s
RELATED QUESTIONS
In each of the following a force, F is acting on an object of mass, m. The direction of displacement is from west to east, as shown by the longer arrow. Observe the diagrams carefully and state whether the work done by the force is negative, positive or zero.
Name a common device where a gear train is used
A coolie does no work against the force of gravity while carrying a luggage on a road.
What are the quantities on which the amount of work done depends? How are they related to work?
The velocity of a car increases from 54 km/hr to 72 km/hr. How much is the work done if the mass of the car is 1500 kg?
Give two examples of work done.
Give an example
Electrical energy changes of sound energy.
Give an example
Chemical energy changes to electrical energy.
