Answer:
The angle of launch of the rubber band affects the initial velocity. The more the rubber band is stretched the more force it applies to return to equilibrium and the more kinetic energy that results in.
v = u + at where v = final speed, u = initial speed , a = acceleration and t = time.
so here final speed v = 30 + 2*4 = 38 m/sec. answer
Distance travelled during this time
= (30 + 38) * 4 / 2 = 68 * 2 = 136 m answer
Boiling points are raised by hydrogen bonds because they make different molecules desire to "attach" to one another, which requires more energy to do so. In water, for instance, the hydrogen proton is in a state that resembles ionization because the connections between oxygen and hydrogen, while covalent, are strongly polar. The oxygen also receives a partial negative charge. Therefore, hydrogen bonds are formed when the electro-positive H in one molecule is strongly electrostatically attracted to the electro-negative O in nearby molecules. Despite being weak links, they are powerful enough to significantly alter the liquid's characteristics.
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Answer: wheres the picture and it could be where they move the fastest
Explanation:
Answer:
Explanation:
Moment of inertial of wheel I = M R²
Work done by force
= F d
It will be converted into rotational + linear kinetic energy
= 1/2 I ω² + 1/2 M V²
= 1/2 M R²ω² + 1/2 MV²
=1/2 MV²+1/2 MV²
MV²
MV² = Fd
V =
b )
acceleration of wheel
V² = 0 + 2 a d
a = V²/ 2d
= Fd / (M x 2d)
= F / 2M
if f be the force of friction
F - f = M a
= M x F / 2M
F - f = F /2
f = F /2
Friction force = F/2