please solve my problems I will mark as brainlist
Answers
Answer:
1. force is either pull or push.
or
force is the cause which produce acceleration in the body in which it act .......SI unit of force is Newton (N)......
2. Newton's first law of motion
A body remains at the state of rest or of uniform motion in straight line unless & untill external force act upon it
Newton's second law of motion
In term of force -
magnitude of net force acting on a body is proportional at to the product of mass of a body and it's acceleration .the direction of a force is the same that of acceleration..........
see in attachment ......
3. m1u1 + m2u2 = m1v1 + m2v2
Proof:
Consider collision between two balls. The momentum of these two balls before collision is given as:
P1i = m1u1
P2i = m2u2
The total momentum of the balls before the collision is given as:
Pi = P1i + P2i
Pi = m1u1 + m2u2
F12 is the force exerted by the m1 during the collision on m2.
F21 is the force exerted by the m2 during the collision on m1.
Therefore, F12 = F21
There is a change in the velocity of these balls after the collision which is given as:
P1f = m1v1
P2f = m2v2
The total momentum of the balls after the collision is given as
Pf= P1f + P2f
Pf= m1v1 + m2v2
From Newton’s second law:
Force = Change in momentum / time interval
F12 = m2v2 – m2u2 / t
F21 = m1v1 – m1u1 / t
From Newton’s third law:
F12 = F21
Therefore, we get:
m1u1 + m2u2 = m1v1 + m2v2
4. see in attachment ☝️
5. Instantaneous acceleration is the acceleration of the object at some discrete instant in time and can be found by taking the derivate of the velocity function. In other words, instantaneous acceleration, or simply acceleration, is the rate of change of velocity with respect to time.
6 . Momentum is a physics term; it refers to the quantity of motion that an object has. A sports team that is on the move has the momentum. If an object is in motion (on the move) then it has momentum. Momentum can be defined as "mass in motion."
P= MV
p = momentum
m= mass
v = velocity
7.
Displacement is a vector quantity that refers to "how far out of place an object is"; it is the object's overall change in position.
hope this helps you .............
Answer:
sorry friend, I read in class 7.
Explanation:
please mark me as brain list.