Ask question

Ask question

All categories

3 years ago

11

1 five disadvantages of frictions

1 answer:

kakasveta [241]3 years ago

8 0

Answer:

Friction produces unnecessary heat leading to the wastage of energy.

The force of friction acts in the opposite direction of motion, so friction slows down the motion of moving objects.

It causes wear and tear of machines.

A lot of money goes into preventing friction and the usual wear and tear caused by it by using techniques like greasing and oiling.
It always resists the motion, so extra energy is required to overcome it.
It decreases the life expectancy of moving parts of vehicles.

Explanation:

You might be interested in

Please Help!! This is very tough for me. Try you best to answer these problems!!Pleaseee

Andrews [41]

Answer:

everyone else does this to me so lol

Explanation:

7 0

3 years ago

Read 2 more answers

an object at rest starts accelerating if it travels 30 meters to end up going 10 m/s what was it’s acceleration

vfiekz [6]

First we have to calculate the time taken to travel the distance 30 m, is

$t = \frac{distance}{velocity} = \frac{30 \ m}{10 \ m/s } = 3 \ s$ .

Now from equation of motion,

$v = u + at$

Given, $v = 10 \ m/s$ .

As object starts from rest, so u = 0.

Substituting these values in above equation, we get

$10 \ m/s = 0 + a \times 3 \ s \\\\ a = \frac{10}{3} = 3.33 \ m/s^2$ .

Thus, the acceleration is $3.33 \ m/s^2$

3 0

4 years ago

Please answer the one you know!

tresset_1 [31]

#8 positive kinetic energy

3 0

3 years ago

If τ=r×F then F.τ is equal

Mademuasel [1]

Yes that is correct.

4 0

3 years ago

Anyone know these questions?

salantis [7]

400m in 32sec: (400/32)>12.5meters per second>
(12.5)(60)(60)(1/1000)=45km per hour
Constant speed would mean that the two forces are equivalent

7 0

3 years ago