Answer:
1.Friction is a catchall word that refers to any force that resists relative tangential motion (or intended motion). "Relative tangential motion" is a fancy way to say "slipping" or "sliding". Its direction is opposite the relative velocity (or intended velocity).
2.Newton’s first law of motion states that a body at rest remains at rest, or, if in motion, remains in motion at a constant velocity unless acted on by a net external force. This is also known as the law of inertia. Inertia is the tendency of an object to remain at rest or remain in motion. Inertia is related to an object’s mass.
Explanation:
Answer:
The silk has become negatively charged
Answer:
d. 1.69 * 10^6 N
Explanation:
Pressure is defined as force divided by area.
Answer:
is called square of Coefficient of Restitution
Explanation:
As we know that the coefficient of restitution is the ratio of the body after collision to the ratio of the body before collision.
<u>Mathematically:</u>
where:
relative velocity after collision
relative velocity before collision
also, in terms of Kinetic energy:
where:
relative kinetic energy after collision
relative kinetic energy before collision
- e=0 for perfectly elastic collision
- 0<e<1 for real world inelastic collision
- e>1 for the collision in which energy is released
- e<1 for the objects passing through one another without fully engaging.
Answer:
6.17 m
Explanation:
We are given that
Initial speed of rubber ball, u=12 m/s
Total height, h=7 m
Initial speed of second ball, u'=0
We have to find the height at which the two balls collide.
Let first rubber ball and second ball strikes after t time.
For first ball
Distance traveled by first ball in time t
Substitute the value
...(1)
Distance traveled by second ball in time t
.....(2)
Using equation (2) in equation (1) we get
sec
Now, using the value of t
S=6.17 m
Hence, at height 6.17 m the two balls collide .