Explanation:
heat caoacity and heat is difference
Explanation:
Let the distance covered by the body be s, initial and final velocities be u and v respectively and time taken be t.
By first equation of motion:
Substituting the value of v in equation (1), we find:
Hence proved.
The 'period' of a pendulum . . . the time it takes to go back and forth once, and return to where it started . . . is
T = 2π √(length/gravity)
For this pendulum,
T = 2π √(0.24m / 9.8 m/s²)
T = 2π √0.1565 s²
T = 0.983 second
If you pull it to the side and let it go, it hits its highest speed at the BOTTOM of the swing, where all the potential energy you gave it has turned to kinetic energy. That's 1/4 of the way through a full back-and-forth cycle.
For this pendulum, that'll be (0.983s / 4) =
<em>(A). T = 0.246 second</em> <em><===</em>
<em></em>
Notice that the formula T = 2π √(length/gravity) doesn't say anything about how far the pendulum is swinging. For small angles, it doesn't make any difference how far you pull it before you let it go . . . the period will be the same for tiny swings, little swings, and small swings. It doesn't change if you don't pull it away too far. So . . .
<em>(B).</em> The period is the same whether you pulled it 3.5 or 1.75 . <em>T = 0.246 s.</em>
Speed is a magnitude, a scalar quantity (i.e. 65 mph)
Velocity is a magnitude and direction, a vector quantity (i.e. 65 mph north)
Acceleration is the change in velocity over a unit of time
(1) Different rates of acceleration.
Given for the motorcycle:
Vi = 80 km/h
Vf = 90 km/h
Given for the bicycle
Vi = 0.0 km/h
Vf = 10 km/h
*IF* the time unit is the same (let's say 10 seconds), the actual value is the SAME for each, because the change in velocity was the same for each. 10 km/h over 10 seconds.
a = [ Vf - Vi ] / t
a = [ (90 km/h) - (80 km/h) ] / (360 h)
a = [ 10 km/h ] / (360 h)
a = 0.023 km/h^2
See, same thing, bicycle or motorcycle, change is 10 km/h, over the same time period gives the same value.
Incidentally, you should usually use meters per second (m/s) and seconds (s) not hours and kilometers.
Acceleration due to gravity on the moon is 1.62m/s^2
weight = mass x gravity
= 40 x 1.62
= 64.8 Newtons
