3 years ago

Give an example of how friction can be used and an example of how friction can be harmful

2 answers:

6 0

Friction between the floor and our shoes is useful because it prevents us from slipping but it’s harmful in machines because it causes parts in contact to wear out

DaniilM [7]3 years ago

5 0

Answer:

friction can be used to slow things down but it can also be harmful because it can cause fire to start

You might be interested in

3. Calculate the force it would take to accelerate a 50 ka bike at a rate of 3 m/s2 (6 points)

qwelly [4]

Answer:

150 N

Explanation:

Given that,

Acceleration (a) = 3 m/s²
Mass of the bike (m) = 50 kg

We are asked to calculate force required.

$\longrightarrow$ F = ma

$\longrightarrow$ F = (50 × 3) N

$\longrightarrow$ F = 150 N

8 0

2 years ago

A proton with a velocity in the positive x-direction enters a region where there is a uniform magnetic field B in the positive y

Genrish500 [490]

Answer:

Positive z direction.

Explanation:

The magnetic force acting on the electron is given by the formula as :

$F=q(v\times B)$

q is the charge on proton

v is the speed of proton

B is the magnetic field

It is mentioned that the proton is moving with a velocity in the positive x-direction. The uniform magnetic field B in the positive y-direction such taht,

q = +e

v = vi

B = Bj

$F=e(v\ i\times B\ j)$

Since, $i\times j=k$

$F=(evB)\ k$

So, the magnetic force acting on the proton in positive z axis. Hence, the correct option is (d) "positive z direction".

8 0

3 years ago

Madison was driving at 40 mph and went 80 miles. How long did it take madison?

monitta

$v=40\ mph\\\\s=80\ miles\\\\t=?\\--------------\\v=\frac{s}{t}\to vt=s\to t=\frac{s}{v}\\--------------\\t=\frac{80\ miles}{40\ mph}=2\ h\leftarrow Answer$

3 0

3 years ago

Read 2 more answers

FIND THE WEIGHT OF A 80 KG MAN ON THE SURFACE OF MOON? WHAT SHOULD BE HISS MASS ON THE EARTH AND ON THE MOON? (ge = 9.8 m/s2 ; g

elena55 [62]

Weight = (mass) x (acceleration of gravity at the place where the mass is) .

Man's mass = 80 kg

His weight on Earth = (80 kg) x (9.8 m/s²) = 784 newtons (about 176 pounds)

His weight on the Moon = (80 kg) x (1.63 m/s²) = 130.4 newtons (about 29.2 pounds)

His mass is 80 kg. Mass is the thing about him that doesn't change.
He has the same mass on the Earth, on the Moon, or anywhere.

8 0

2 years ago

The pedals on a bicycle give a mechanical advantage by allowing you to turn the pedals a __________ distance to turn the _______

denpristay [2]

Short distance to turn the circumference of the wheels. Mechanical advantage is load/effort I think

6 0

3 years ago

Read 2 more answers