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3 years ago

Pushing the body harder than it's ready to be pushed during exercise

1 answer:

5 0

Pushing the body harder than its ready to be pushed during exercise can lead to getting badly hurt. It can also help to increase the limit of the body power. It should be kept in mind that pushing the body to over the limits can be a very dangerous matter and this should only be done under the supervision of the experts.

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A car is stopped for a traffic signal. When the light turns green, the car accelerates, increasing its speed from 0 to 5.10 m/s

yarga [219]

Answer:

$I=336.6kgm/s$

Explanation:

The equation for the linear impulse is as follows:

$I=F\Delta t$

where $I$ is impulse, $F$ is the force, and $\Delta t$ is the change in time.

The force, according to Newton's second law:

$F=ma$

and since $a=\frac{v_{f}-v_{i}}{\Delta t}$

the force will be:

$F=m(\frac{v_{f}-v_{i}}{\Delta t})$

replacing in the equation for impulse:

$I=m(\frac{v_{f}-v_{i}}{\Delta t})(\Delta t)$

we see that $\Delta t$ is canceled, so

$I=m(v_{f}-v_{i})$

And according to the problem $v_{i}=0m/s$ , $v_{f}=5.10m/s$ and the mass of the passenger is $m=66kg$ . Thus:

$I=(66kg)(5.10m/s-0m/s)$

$I=(66kg)(5.10m/s)$

$I=336.6kgm/s$

the magnitude of the linear impulse experienced the passenger is $336.6kgm/s$

6 0

3 years ago

A creature moves at a speed of 7.86 furlongs/fortnight (not a very common unit of speed). If 1.0 furlong = 220 yards 1 fortnight

AVprozaik [17]

Answer:

2 0.00130719 m/s

Explanation:

Now we have

7.86 furlongs/fortnight

7.86 x 220 yards / fortnight

1729.2yards / fortnight

1647.8 yards / 14 days

123.5yards / day

123.5 x 0.9144 meter / day

112.meters / day

=112.9meters / 86400s

= 0.001307m/s

5 0

3 years ago

Which of the following statements about stress management is TRUE?

ivolga24 [154]

Answer:

Explanation:

Basically all the other answer are opposites like Exercise is an effective way to relieve stress and lots of Stress does have Negative effects on people

7 0

3 years ago

Read 2 more answers

6. The petrol in a petrol can weighs 2000g. The density of petrol is 0.8g/cm3.

frez [133]

Answer:

a. 2500 cm³.

b. 2.5 litres.

Explanation:

Given the following data:

Density = 0.8g/cm³

Mass = 2000g

To find the volume of the petrol;

Density can be defined as mass all over the volume of an object.

Simply stated, density is mass per unit volume of an object.

Mathematically, density is given by the equation;

$Density = \frac{mass}{volume}$

Making volume the subject of formula, we have;

$Volume = \frac{mass}{density}$

Substituting into the equation, we have:

$Volume = \frac{2000}{0.8}$

Volume = 2500 cm³

a. The volume of the petrol in the can in cubic centimeters (cm³) is 2000.

b. The volume of the petrol in the can in litres;

1000 cm³ = 1 litre

2500 cm³ = x litres

Cross-multiplying, we have;

1000x = 2500

x = 2500/1000

x = 2.5 litres.

Therefore, the volume of the petrol in the can in litres is 2.5.

7 0

3 years ago

5. is the earth’s magnetic field parallel to the ground at all locations? if not, where is it parallel to the surface? is its st

Setler79 [48]

The Earth's magnetic field lines appear to emanate perpendicularly from the poles and go round along the Earth from the South Pole to the North Pole. Therefore, the Earth's magnetic field is generally not parallel to the ground at every location. It is parallel to the earth at the equator near the earth's surface.

The Earth's magnetic field, also known as the geomagnetic field, is a magnetic field that extends from the Earth's interior into space, where it interacts with the solar wind, a stream of charged particles emanating from the Sun.

The magnetic field varies in strength over the earth's surface. It is strongest at the poles and weakest at the equator.

To know more about Earth's magnetic field,

brainly.com/question/13019369

#SPJ4

3 0

2 years ago