1. On basis of which law does the rocket work?
2. Define momentum with its SI unit and say how impulse is expressed in terms of momentum
3. A man travels a distance of 1.5m towards east, then 2m towards South and finally 4.5m towards east
(a) calculate the total distance travelled
(b) calculate the resultant displacement
Answers
Answered by
1
1 )third law of motion.
2) momentum is defined aa product of mass and velocity.si unit is kg.m/s
2) momentum is defined aa product of mass and velocity.si unit is kg.m/s
Answered by
1
1. Law of conservation of momentum. OR
Newton's third law of motion.
2. Momentum is the quantity of motion OR product of velocity and mass of an object.
S.I unit --- kg.m/s
Impluse is the total effect of force. It is measured in newton second (Ns)
1 impulse = 1 Kg.m/s Or Ns
3. A --------------- B
|
|
|
C |___________D
AB = 1.5 m
BC = 2 m
CD = 4.5 m
a) Total distance travelled = AB+BC+CD
= 1.5 + 2 + 4.5
= 8 m
b) Resultant displacement = AD = 5.9 m ( approximately )
( Join AD and find its length using ruler )
( Use 1 cm = 1 m)
Newton's third law of motion.
2. Momentum is the quantity of motion OR product of velocity and mass of an object.
S.I unit --- kg.m/s
Impluse is the total effect of force. It is measured in newton second (Ns)
1 impulse = 1 Kg.m/s Or Ns
3. A --------------- B
|
|
|
C |___________D
AB = 1.5 m
BC = 2 m
CD = 4.5 m
a) Total distance travelled = AB+BC+CD
= 1.5 + 2 + 4.5
= 8 m
b) Resultant displacement = AD = 5.9 m ( approximately )
( Join AD and find its length using ruler )
( Use 1 cm = 1 m)
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