Answer:
Explanation:
Let the velocity after the 4 gram pencil strikes is v .
kinetic energy of the combination = 1/2 m v²
= .5 x ( 4 + 221 ) x 10⁻³ x v² = work done by friction
friction force acting on the combination = 225 x10⁻³x .325 x 9.8 = .7166 N
work done by friction
= .7166 x .119 = .085 J
.5 x 225 x 10⁻³ v² = .085
v² = .085 / .1125 = .7555
v = .8692 m = 86.92 cm /s
Velocity of combination after collision = 86.92 cm /s
Let velocity of pencil before collision be V
Applying law of conservation of momentum at the time of collision ,
4 x V = 225 x 86.92
V = 4889.25 cm / s
= 48.9 m /s .
Answer:
A) energy similar to radiant heat from the sun
Answer:
F= 5.71 N
Explanation:
width of door= 0.91 m
door closer torque on door= 5.2 Nm
In order to hold the door in open position we need to exert an equal and opposite torque, to the door closer torque, on the door.
so wee need to exert 5.2 Nm torque on the door.
If we want to apply minimum force to exert the required torque we need to apply force perpendicularly on the door knob (end of door) so that to to greater moment arm.
T= r x F
T= r F sin∅
F= T/ (r * sin∅)
F= 5.2/ (0.91 * 1)
F= 5.71 N
Answer:
Is this a question? Because all I gotta say is "WOW"
Explanation:
Answer:
Positive
<h3>This type of charging is called charging by induction </h3>
- In this the uncharged body gets the opposite type of charge.
when a negatively charged rod is bring near uncharged spherical conductor it attracts positive charge and repels negative charges
so In left side all positive charges appears and in right side all negetive
<em><u>Types </u></em><em><u>of</u></em><em><u> </u></em><em><u>method</u></em><em><u>s</u></em><em><u> </u></em><em><u>of </u></em><em><u>charg</u></em><em><u>ing</u></em><em><u> </u></em>
- <em><u>Charging </u></em><em><u>by </u></em><em><u>contact </u></em>
- <em><u>charging </u></em><em><u>by </u></em><em><u>rubbing </u></em>
- <em><u>charging </u></em><em><u>by </u></em><em><u>induction</u></em><em><u>.</u></em>