Chapter 9-Force and Laws of Motion

________ first introduced one such property, called momentum.

Newton

________ deduced that objects move with a constant speed when no force acts on them.

Galileo

An object's mass, m, and velocity v, are multiplied to create its ________ , or p. that is p= mv.

momentum

When a gun is fired, the bullet experiences a ________ force.

forward

________ has both direction and magnitude.

Vector Quantitiy

________ is the qualitative term for an object's tendency to remain at rest or to keep moving at a constant speed in the absence of an external force.

Inertia

An unbalanced (external) force is required to change the motion of objet but no net force is needed to sustain the ________ of the object.

uniform motion

Inertia is the natural tendency of an object to ____ a change in its state of motion or of rest

resist

______ is a measure of the inertia of a body.

mass

Newton’s first law of motion is also called Galileo’s law of _______

inertia

A(n)__________ force acting on an object brings it in motion.

unbalanced

third law of motion acts of ________ bodies

different

If the mass of the body is doubled and its velocity becomes half, then the change in linear momentum of the body will be ________

zero

A fielder giving a swing while catching a ball is an example of ___________

Newton’s 2nd law of motion(rate of change of momentum)

When we pedaling the bicycle it stops because of __________

friction

A football and a stone of same mass will have same _______

inertia