10 points

Two blocks of masses M and 2M are initially traveling at the same speed v but in the opposite directions. They collide and stick

Hatshy [7]

Answer:

Explanation:

Given

Two masses M and 2 M with velocity v in opposite direction

After collision they stick together

Initial momentum

$P_i=Mv-2Mv$

final momentum

$P_f=3Mv'$

Conserving momentum

$P_i=P_f$

$-Mv=3Mv'$

$v'=\frac{v}{3}$

i.e. system moves towards the direction of 2M mass

Initial kinetic Energy $K_1=\frac{1}{2}Mv^2+\frac{1}{2}2Mv^2$

$K_1=\frac{3}{2}Mv^2$

Final Kinetic Energy $K_2=\frac{1}{2}\cdot (3M)\cdot (\frac{v}{3})^2=\frac{3}{18}Mv^2$

loss of Energy $=K_1-K_2$

$=\frac{3}{2}Mv^2-\frac{3}{18}Mv^2$

$=\frac{4}{3}Mv^2$

3 0

3 years ago

What is the potential difference between the plates of a 3.7-f capacitor that stores sufficient energy to operate a 75.0-w light

Elena L [17]

The potential difference between the plates will be 1552 Volts.

<h3>What is a potential difference?</h3>

Voltage, or the difference in electric potential between two points, is defined as the amount of labor per unit of charge needed to move a test charge between the two points.

Given that a 3.7-f capacitor that stores sufficient energy to operate a 75.0-w

The potential difference will be calculated by the formula below:-

Q = I t

Where I = charge / time

Q = V * C

V C = I t

V = I t / C

V = 75 C/s x 60 sec / 2.9 faraday

V = 1552 Volts

To know more about potential differences follow

brainly.com/question/25923373

#SPJ4

4 0

1 year ago

What is the unit to measure force?

melomori [17]

Answer: Newton

Explanation:

Force is measured in Newtons, which are units that equal 1 kg * m/sec2. You can calculate the amount of force that an object experiences with the equation force = mass * acceleration

5 0

3 years ago

How does the numerical value of "e" change as the shape of the ellipse approaches a straight line?

Aleks04 [339]

At eccentricity = 0 we get a circle For 0 < eccentricity < 1 we get an ellipse for eccentricity = 1 we get a parabola for eccentricity > 1 we get a hyperbola for infinite eccentricity we get a lineSHOW FULL ANSWER

4 0

3 years ago

EMERGENCY!! Doing my Physics homework now and I need help on this one please - all information provided, I'd be very VERY gratef

IrinaK [193]

(a) The vertical motion is accelerated by gravity. The horizontal component is constant (neglecting air resistance, if this is not a projectile motion, the horizontal component would also be accelerated)

(b) Vertical:

$v_y = 30\sin 40^\circ = 19.3\frac{m}{s}$

Horizontal:

$v_x = 30\frac{m}{s}\cos 40^\circ = 23.0 \frac{m}{s}$

(c) Use the kinematic equation for distance. Calculate only the vertical component (horizontal is irrelevant):

$s_y = -\frac{1}{2}gt^2 +vt\,,\,\,\,s_y=0\\0 = -\frac{1}{2}gt^2 +vt\\\frac{1}{2}gt =v\\t = \frac{2v}{g}= \frac{2\cdot30\sin 40^\circ\frac{m}{s}}{9.8\frac{m}{s^2}}=3.9s$

The ball will be in the air for about 3.9 s.

(d) The range is the horizontal distance traveled. We know the ball is in the air for 3.9s and it moves with a horizontal velocity of 23 m/s. So:

$s_x = 23\frac{m}{s}\cdot 3.9 s = 89.7m$

The range is 89.7 meters.

6 0

3 years ago