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3 years ago

15

Afootball of mass 550g is at rest on the ground the football is kicked with a force of 108 newton the footballers boot is in con

tact with the ball for 0.3 minute what is the kenitic
energy of the ball

1 answer:

d1i1m1o1n [39]3 years ago

6 0

If "0.3 minute" is correct, then it's 9,543,272 Joules.

If it's supposed to say "0.3 SECOND", then the KE is 2,651 Joules.

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A book weighing 2 Newtons is at rest on a table. The net force on the book is zero.

natta225 [31]

Answer: I think its True

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2 years ago

Calculate the velocity of a car that travelled 120km in 2 hours<br>

Naddik [55]

I need context poggg

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2 years ago

Isolating a variable in two equations is easiest when one of them has a coefficient of 1. Let's say we have the two equations 3A

xxTIMURxx [149]

Answer:

$B=3A-5$

Explanation:

<u>Variable Isolation</u>

It's a common practice when dealing with equations that we have to isolate one variable in terms of other variables and/or constants. The isolation of the variable usually implies adding, subtracting, multiplying or dividing by constants. The following example shows how to isolate the A:

$2A+3B=-4\\\\2A=-4-3B\\\\\displaystyle A=\frac{-4-3B}{2}$

We are required to find the equation where the variable has a coefficient of 1 and isolate it. The following equation fits into the description:

$3A-B=5$

Isolating B:

$B=3A-5$

3 0

3 years ago

THE NUMERICAL RATIO OF DISPLACEMENT TO DISTANCE IS:

Tamiku [17]

There's no general rule.

Displacement is the length of a straight line from start to finish, and distance is how far you actually traveled from start to finish.

The only thing we really know is that distance can never be shorter than displacement. So I guess the answer is:

<em>The numerical ratio of displacement to distance is always 1 or less</em>.

(But it has to be written ALL IN CAPITALS.)

7 0

3 years ago

A patricle is accelerated uniformly from rest, so that after 10 seconds it has a speed of 15m/s find its acceleration and the di

grin007 [14]

Answer:

Its acceleration is 1.5 $\frac{m}{s^{2} }$ and the distance it has covered is 150 m.

Explanation:

Acceleration is a quantity that indicates the variation in speed of a moving body as time passes. That is, acceleration relates changes in velocity with the time in which they occur.

The average acceleration is defined as the relationship between the variation or change in the speed of a mobile and the time used in said change:

$acceleration=\frac{change in speed}{time}$

In this case:

change in speed= final speed - initial speed= 15 m/s - 0 m/s= 15 m/s
time= 10 s

Replacing:

$acceleration=\frac{15 \frac{m}{s} }{10 s}$

and solving you get:

<u><em>acceleration= 1.5 </em></u> $\frac{m}{s^{2} }$ <u><em></em></u>

Speed is a quantity that expresses the relationship between the space traveled by an object and the time used for it. This is:

$speed=\frac{distance}{time}$

So the distance can be calculated as:

distance= speed* time

In this case:

speed= 15 m/s
time= 10 s

Replacing:

distance= 15 m/s* 10 s

and solving you get:

<u><em>distance= 150 m</em></u>

<u><em>Its acceleration is 1.5 </em></u> $\frac{m}{s^{2} }$ <u><em> and the distance it has covered is 150 m.</em></u>

8 0

3 years ago