The acceleration of the body in the graph given below is___

A ball is tossed with enough speed straight up so that it is in the air several seconds. Assume upward direction is positive and

Viefleur [7K]

Answer:

The velocity of the ball when it reaches its highest point is 0

Explanation:

The velocity of the ball when it reaches its highest point is 0

Once the ball is tossed into the air, as it goes up, the initial velocity with which it was thrown, reduces, as the motion of the ball is hindered by several forces such as gravity and air resistance. This slows down the velocity of the ball, up until it reaches a point, where the upwards velocity of the ball becomes zero. at this point, the ball begins to fall back to the ground.

6 0

3 years ago

To heat the water in the tank from 50°C to 58°C the immersion heater transfers

LenKa [72]

Let's see

∆T=58-50=8°C

So

$\\ \rm\Rrightarrow Q=mc\Delta T$

$\\ \rm\Rrightarrow 4032=4200(8)m$

$\\ \rm\Rrightarrow 4032/8=4200m$

$\\ \rm\Rrightarrow 504=4200m$

$\\ \rm\Rrightarrow m=0.12kg$

$\\ \rm\Rrightarrow m=120g$

4 0

2 years ago

Energy is defined as ____. a. movement of electrons b. capacity to store sugar c. the movement of atoms and molecules d. the

8090 [49]

Answer:

option (d)

Explanation:

Energy is defined as the capacity to do work.

Energy can neither be created and nor be destroyed, it can transform from one form to another.

The SI unit of energy is Joule and teh commercial unit of energy is kilowatt hour.

There are several forms of energy.

1. kinetic energy

2. potential energy

3. mechanical energy

4. Solar energy

5. Sound energy

4 0

3 years ago

A disk between vertebrae in the spine is subjected to a shearing force of 600 N. Find its shear deformation, taking it to have t

Art [367]

Answer:

3.34×10^-6m

Explanation:

The shear modulus can also be regarded as the rigidity. It is the ratio of shear stress and shear strain

can be expressed as

shear stress/(shear strain)

= (F/A)/(Lo/ . Δx)

Stress=Force/Area

The sheear stress can be expressed below as

F Lo /(A *Δx)

Where A=area of the disk= πd^2/4

F=shearing force force= 600N

Δx= distance

S= shear modulus= 1 x 109 N/m2

Lo= Lenght of the cylinder= 0.700 cm=7×10^-2m

If we make Δx subject of the formula we have

Δx= FLo/(SA)

If we substitute the Area A we have

Δx= FLo/[S(πd^2/4]

Δx=4FLo/(πd^2 *S)

If we input the values we have

(4×600×0.7×10^-2)/10^9 × 3.14 ×(4×10^-2)^2

= 3.35×10^-6m

Therefore, its shear deformation is 3.35×10^-6m

A=area of the disk= πd^2/4

= [3.142×(4×10^-2)^2]/4

7 0

3 years ago

A skier leaves the horizontal end of a ramp with a velocity of 25.0 m/s and lands 70.0 m from the base of the ramp. How high is

Valentin [98]

Answer:

Explanation:

<u>Horizontal Motion </u>

When an object is thrown horizontally with an initial speed v and from a height h, it follows a curved path ruled by gravity.

The maximum horizontal distance traveled by the object can be calculated as follows:

$\displaystyle d=v\cdot\sqrt{\frac {2h}{g}}$

If the maximum horizontal distance is known, we can solve the above equation for h:

$\displaystyle h=\frac {d^2g}{2v^2}$

The skier initiates the horizontal motion at v=25 m/s and lands at a distance d=70 m from the base of the ramp. The height is now calculated:

$\displaystyle h=\frac {70^2\cdot 9.8}{2\cdot 25^2}$

$\displaystyle h=\frac {4900\cdot 9.8}{2\cdot 625}$

h= 38.416 m

The end of the ramp is 38.416 m high

8 0

3 years ago

The acceleration of the body in the graph given below is____