How many years older will you be 1.70 billion seconds from now? (Assume a 365-day year.)

A man kicks the 150-g ball such that it leaves the ground at an angle of 60° and strikes the ground at the same elevation a dist

egoroff_w [7]

Answer:

$313.92\ \text{m/s}$

$47.088\ \text{kg m/s}$

Explanation:

m = Mass of ball = 150 g

$\theta$ = Angle of kick = $60^{\circ}$

$x$ = Displacement of ball in x direction = 12 m

Range of projectile is given by

$x=\dfrac{u\sin^2\theta}{2g}\\\Rightarrow u=\dfrac{2xg}{\sin^2\theta}\\\Rightarrow u=\dfrac{2\times 12\times 9.81}{\sin^260^{\circ}}\\\Rightarrow u=313.92\ \text{m/s}$

The velocity of the ball instantly after the man kicks the ball is $313.92\ \text{m/s}$

Impulse is given by

$J=mu\\\Rightarrow J=0.15\times 313.92\\\Rightarrow J=47.088\ \text{kg m/s}$

The impulse of his foot on the ball is $47.088\ \text{kg m/s}$ .

3 0

3 years ago

A developmental psychologist would be interested in studying __________. A. different philosophies about life after death B. psy

Sholpan [36]

B nothing else has to do with developmental psych

8 0

3 years ago

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Determine the total moment of inertia of a merry-go round with 5 children sitting on it. Of the five children, four are seated a

BaLLatris [955]

Answer:

Explanation:

Given that,

We have five children.

Each of mass m =30kg

They sit on a merry go round

Mass of Merry go round M= 150kg

Radius of Merry go round is r =2m

Four children sit at the edge of the merry go round but one child sit at the centre.

The four child that sit at the edge are 2m from the centre of the merry go round but the one at the centre is 0m from the centre

Moment of inertia?

Moment of inertia is given as

I=Σmi•ri²

For the question, the moment of inertia is the combination of inertial of child and the merry go round

I= I(merry go round) + I(four child)+ I(last child)

The merry go round is assumed to be a solid cylinder, so it is going to have the moment of inertia of solid cylinder

Then,

I(merry go round ) =½ Mr²

Also, Four of the child has the same moment of inertia, they are 2m form the centre of the merry go round why the last child has no moment of inertia

I= I(merry go round) + I(four child) +I(last child )

I= ½Mr² + 4mr² + mr'²

I = ½ × 150 ×2² + 4×30×2² + 30×0²

I = 300 +480+0

I = 780 kgm²

7 0

3 years ago

What type of mixture does the foam demonstrate?

Ksenya-84 [330]

This question doesn't appear to be complete

4 0

3 years ago

Which feature of a heating curve indicates a change of state?

Andreas93 [3]

A "heating curve" is a graph that shows the temperature of the substance
against the amount of heat you put into it.

For most of the graph, as you'd expect, the temperature goes up as you
add heat, and it goes down as you take heat away. BUT ... While the
substance is changing state, its temperature doesn't change even though
you're putting heat in or taking heat out.

So that part of the graph is a horizontal line.

7 0

4 years ago

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