All categories

2 years ago

What are two ways in which friction can be useful?

Physics

2 answers:

pishuonlain [190]2 years ago

6 0

If something is going down a hill it can help slow it down

it can stop you from flying off a rollercoaster

Katena32 [7]2 years ago

5 0

Friction slows an object down. the brakes in your car are a good example of friction.

You might be interested in

When have you experienced an increase in kinetic<br> energy within a system?

Mars2501 [29]

Answer:

If a man starts running on a boat with an acceleration a with respect to the boat, there is no external force that acts on the Boat+Man system

8 0

2 years ago

Which type of nuclear reaction involves combining light elements into a heavier element, with a resultant release of great amoun

torisob [31]

Answer: Fusion

Explanation:

Combustion is a chemical reaction in which hydrocarbons are burnt in the presence of oxygen to give carbon dioxide and water.

Nuclear fusion is a process which involves the conversion of two small nuclei to form a heavy nuclei along with release of energy.

$_{94}^{239}\textrm{Pu}+_2^4\textrm{He}\rightarrow _{96}^{242}\textrm{Cm}+_0^\textrm{n}$

Nuclear fission is a process which involves the conversion of a heavier nuclei into two or more small and stable nuclei along with the release of energy.

$_{92}^{235}\textrm{U}+_0^1\textrm{n}\rightarrow _{36}^{91}\textrm{Kr}+_{56}^{142}\textrm{Ba}+_{0}^{1}\textrm{n}$

8 0

3 years ago

Read 2 more answers

Which waves are longitudinal waves? Check all that apply.

alekssr [168]

Sound waves.
Eathquake P-Waves

7 0

2 years ago

Read 2 more answers

PLEASE HELP ME!!!! During ________ particles and/or radiation are emitted or given off.

Aliun [14]

C. Radioactive decay

5 0

2 years ago

An 85-kg hiker climbs to the summit of Mount Mitchell in western North Carolina. During one 2.0-h period, the climber's vertical

Bas_tet [7]

Answer:

The change in gravitational potential energy of the climber-Earth system, $\Delta E=4.49\times 10^5\ J$

Explanation:

Given that,

Mass of the hiker, m = 85 kg

Time, t = 2 h

Vertical elevation of the climber, h = 540 m

We need to find the change in gravitational potential energy of the climber-Earth system. We know that due to change in position of an object, gravitational potential energy occurs. It is given by :

$\Delta E=mgh\\\\\Delta E=85\times 9.8\times 540\\\\\Delta E=4.49\times 10^5\ J$

So, the change in gravitational potential energy of the climber-Earth system is $4.49\times 10^5\ J$ . Hence, this is the required solution.

5 0

3 years ago