Answer:
c.
=0 and 
Explanation:
We are given that two particles collide and stick together.
If there is no external force act on the two particles then ,it is inelastic collision.
Inelastic collision: There is some loss of kinetic energy but the momentum is conserved.
According to law of conservation of momentum
Initial momentum=Final momentum
Change in momentum=Final momentum-Initial momentum=0
Change in momentum=
Initial kinetic energy is greater than final kinetic energy.
Change in kinetic energy=Final kinetic energy-kinetic energy=- negative
Hence, option c is true.
c.=0 and
Answer:
16km/hr
Explanation:
Total distance travelled= 10km+6km
Time taken= 1 hour
As we know that,
Velocity = distance/time
So,
Velocity= 16km/hr
Answer:
The direct answer to the question as written is as follows: nothing happens to gravity when someone jumps up - gravity continues exerting a force on the body of that particular someone proportional to (mass of someone) x (mass of Earth) / (distance squared). What you might be asking, however, is what is the net force acting on the body of someone jumping up. At the moment of someone jumping up there is an upward acceleration, i.e., an upward-directed force which counteracts the gravitational force - this is the net force ( a result of the jump force minus gravity). From that moment on, only gravity acts on the body. The someone moves upward gradually decelerating to the downward gravitational acceleration until they reaches the peak of the jump (zero velocity). Then, back to Earth.
Answer: 2.541884 meters
Explain:
Formula: s = 0.5 * g * t^2
Time of fall (t) is 0.72 while the gravitational acceleration rate is (9.80665m/s^2).
Answer:
See the answer below.
Explanation:
The weight of the table should be equal to the weight of the table plus the weight of the book.
![w_{table}=m_{table}*g\\w_{table}=200*9.81\\w_{table}=1962[N]](https://tex.z-dn.net/?f=w_%7Btable%7D%3Dm_%7Btable%7D%2Ag%5C%5Cw_%7Btable%7D%3D200%2A9.81%5C%5Cw_%7Btable%7D%3D1962%5BN%5D)
And for the book
![w_{book}=m_{book}*g\\w_{book}=50*9.81\\w_{book}=490.5[N]](https://tex.z-dn.net/?f=w_%7Bbook%7D%3Dm_%7Bbook%7D%2Ag%5C%5Cw_%7Bbook%7D%3D50%2A9.81%5C%5Cw_%7Bbook%7D%3D490.5%5BN%5D)
And the total weight
![w = w_{table}+w_{book}\\w=1962+490.5\\w = 2452.5 [N]](https://tex.z-dn.net/?f=w%20%3D%20w_%7Btable%7D%2Bw_%7Bbook%7D%5C%5Cw%3D1962%2B490.5%5C%5Cw%20%3D%202452.5%20%5BN%5D)
For the system to be in balance, the reaction force exerted by the table on the book must be equal to the weight of the book. This force in physics is known as the normal force.
![N_{force} = w_{book}\\N_{force}=490.5[N]](https://tex.z-dn.net/?f=N_%7Bforce%7D%20%3D%20w_%7Bbook%7D%5C%5CN_%7Bforce%7D%3D490.5%5BN%5D)
