momentum and impulse + vertical projectile motion

Question 1

momentum

Answer 1

the product of an object’s mass and its velocity
p=m.v
p- kg.m.s-1
m- kg
v - m.s -1

Question 2

newtons second law of motion in terms of motion

Answer 2

the net (or resultant) force acting on an object is equal to the rate of change of momentum of the object in the direction of the net force.

Fnet= m.a
Fnet= m.delta /delta t
Fnet= delta p/ delta t

change in momentum over change in time ( rate of change in momentum)

Question 3

impulse

Answer 3

the product of the resultant/ net force acting on the object and the time the net force acts on the object
fnet. delta t

Question 4

isolated system

Answer 4

System on which there are no ext forces acting

Question 5

isolated system

Answer 5

system on which there are no ext forces acting

Question 6

internal forces

Answer 6

contact forces betw objects in system

Question 7

ext forces

Answer 7

non contact forces upoun objects in the system

Question 8

principle of conservation of linear momentum

Answer 8

the total linear momentum of an isolated system remains constant (is conserved)

Question 9

projectile

Answer 9

an object which has been given an initial velocity and then moves under the influence of the gravitational force only

Question 10

free- fall

Answer 10

motion during which the only force acting on an object is gravitational force