Forces and momentum

Question 1

Force

Answer 1

Anything that has the potential to cause an object to accelerate

Question 2

Mass (mechanics)

Answer 2

A measure of an objects inertia

Question 3

A Newton

Answer 3

The force which causes an object ,to undergo acceleration of 1m/s

Question 4

Inertia

Answer 4

An objects tendency to resist movement unless an external force acts upon it

Question 5

To find force

Answer 5

F=ma

Question 6

friction

Answer 6

a force that opposes the relative motion between two objects

Question 7

Newton’s first law of motion

Answer 7

States that every object will continue to travel at constant velocity unless acted on by an (unbalanced) external force

Question 8

Newton’s second law of motion

Answer 8

States that the rate of change of an objects momentum is directly proportional to the force that caused it and takes place in the same direction as the force

Question 9

Newton’s third law of motion

Answer 9

For every action there is an equal in magnitude yet opposite in direction reaction

Question 10

Impulse

Answer 10

Change in momentum

Question 11

Weight

Answer 11

A measure of the earth gravitational force acting on an object

Question 12

Weight formula

Answer 12

Mass x gravitational field strength (9.8)

Question 13

The principle of conservation of momentum

Answer 13

In any interaction , the total momentum before the interaction is equal to the total momentum afterwards , provided no external forces act on the system

Question 14

If one object collides with another

Answer 14

(m1)(u1)+(m2)(u2)=(m1)(v1)+(m2)(v2)

Question 15

If one object collides with another and the 2 objects stick together then there is only one common velocity after collision

Answer 15

(m1)(u1)+(m2)(u2)=(m1+m2)v3

Question 16

2 objects with no momentum beforehand end up with equal and opposite after e.g a gunshot, one of the velocities will be negative

Answer 16

0=(m1)(v1)+(m2)(v2)