4 years ago

You could increase the mechanical efficiency of this screw by

Physics

1 answer:

Nutka1998 [239]4 years ago

4 0

Using a shorter screw driver or a drill

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Small blocks A and B are held at rest on a smooth plane inclined at 30° to the horizontal. Each is held in equilibrium by a forc

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<h3>Answer :</h3>

First of all, See the attachment for better understanding $.$

_________________________________

❂ Weight of block A :

➝ mg sin30° = 18

➝ W (1/2) = 18

➝ W = 18×2

➝ W = 36N 

❂ Weight of block B :

➝ N sin30° = 18

➝ (Mg cos30°) sin30° = 18

➝ W' (√3/2)(1/2) = 18

➝ W' (√3/4) = 18

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If this speed is based on what would be safe in wet weather, estimate the radius of curvature for a curve marked 70 km/h . The c

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as it is given that curved marked the speed as v = 70 km/h

so we will first convert the speed into m/s

$v = 70 km/h = 19.44 m/s$

now we know that here friction force will provide centripetal force

$F_c = F_f$

As we know that centripetal force is given as

$F_c = \frac{mv^2}{R}$

$\frac{mv^2}{R} = \mu_k mg$

$\frac{v^2}{R} = \mu_k g$

$v^2 = \mu_k R * g$

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