All categories

3 years ago

Tell me that all answers plz

Physics

2 answers:

ki77a [65]3 years ago

8 0

Answer:

a. Value of MA is always lesser than VR because mechanical advantage decreases due to the friction and weight of moving parts of the machine.

b.Efficiency of lever is never 100 or more because it will always lose some tiny (sometimes immeasurable) percentage of power due to the lever bending.

c.Because it helps to apply more torque.

d.Because the upright snip has the blades rotated 90° from the handles.

e.because some of the input work is used to overcome friction.

f.because the load arm is always longer than effort arm.

g.because the effort arm is always longer than load arm of these Lever.

h. because if the effort distance is greater than load distance there will be magnification of force and the metals could easily cut.

i. because the wheelbarrow's wheel and axle help the wheelbarrow to move without friction thus making it easier to push or pull.

maksim [4K]3 years ago

3 0

Answer:

Tell me that all answers plz

No spammers

Lesson: simple machine

Great answer will be brainliest answer

You might be interested in

Identify the elements that come before iron (Fe) in the periodic table Fe, Co, Cu, K, Ni, Mn

harkovskaia [24]

FE is iron CO is cobalt CU is copper K is potassium NI is nickle MN is magnemese

5 0

3 years ago

Read 2 more answers

A force of 12 N changes the momentum of a toy car from 3kgm/s t0 10kgm/s. Calculate the time the force took to produce this chan

yan [13]

Answer:

Time = 0.58 seconds

Explanation:

Given the following data;

Initial momentum = 3 kgm/s

Final momentum = 10 kgm/s

Force = 12 N

To find the time required for the change in momentum;

First of all, we would determine the change in momentum.

$Change \; in \; momentum = final \; momentum - initial \; momentum$

$Change \; in \; momentum = 10 - 3$

Change in momentum = 7 kgm/s

Now, we can find the time required;

Note: the impulse of an object is equal to the change in momentum experienced by the object.

Mathematically, impulse (change in momentum) is given by the formula;

$Impulse = force * time$

Making "time" the subject of formula, we have;

$Time = \frac {impulse}{force}$

Substituting into the formula, we have;

$Time = \frac {7}{12}$

Time = 0.58 seconds

6 0

3 years ago

An electronic line judge camera captures the impact of a 57.0-g tennis ball traveling at 32.2 m/s with the side line of a tennis

mote1985 [20]

Answer:

average acceleration is 1.365 × $10^{4}$ m/s²

Explanation:

given data

initila speed u = -32.2 m/s

final speed v = 21.6 m/s

time taken t = 0.00394 s

solution

we get here average acceleration that will be express as

v = u + at ..........................1

put here value and we get

21.6 = -32.2 + a × 0.00394

solve it we get

a = 1.365 × $10^{4}$ m/s²

so average acceleration is 1.365 × $10^{4}$ m/s²

3 0

3 years ago

Heating effect of current is not always useful for us. Support your answer with example<br>

stellarik [79]

Answer:

is correct

Explanation:

in my think, first this due to ray emitted from the light those ray may be affect our skin or party of body.

4 0

3 years ago

A small boat is moving at a velocity of 3.35m/s when it is accelerated by a river current perpendicular to the initial direction

mr_godi [17]

Answer:

v =7.1 m/s

Explanation:

Given that

u = 3.35 m/s

t= 5 s

a= 0.75 m/s²

The final velocity = v

We know v = u +at

v=final velocity

u=initial velocity

Now by putting the values in the above equation

v = 3.35 + 0.75 x 5 m/s

v =7.1 m/s

Therefore the final velocity will be 7.1 m/s

7 0

3 years ago