3 years ago

Show that 2sinøcosø =sin2ø

Physics

1 answer:

bulgar [2K]3 years ago

8 0

https://www.dailymotion.com/video/x4ug3zm

watch this video and u will get answer

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A 50.0 kg crate is pulled 375 N of force applied to a rope. The crate slides without friction.

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Hi there!

We can use the work-energy theorem to solve.

Recall that:

$\large\boxed{W = \Delta KE = \frac{1}{2}mv_f^2 - \frac{1}{2}mv_i^2}$

The initial kinetic energy is 0 J because the crate begins from rest, so we can plug in the given values for mass and final velocity:

$W = \frac{1}{2}(50)(5.61^2) = 786.8025 J$

Now, we can define work:

$\large\boxed{W = Fdcos\theta}}$

Now, plug in the values:

$786.8025 = Fdcos\theta\\\\786.8025 = (375)(3.07)cos\theta$

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2 years ago

Show that 2sinøcosø =sin2ø​

Show that 2sinøcosø =sin2ø