Timmy bikes to school 3 kilometers east and 2 kilometers south. What is Timmy's final displacement?

Answers

Answer 1

Answer:

Answer:

3.6km South East

Explanation:

Displacement is the shortest distance between the starting point and the ending point and the direction it is displaced in. To calculate the displacement we can use the pythagoras theorem because the 3km East and the 2km south form the two shorter sides of a right angled triangle between the starting and ending points. So, the displacement is the length C of the triangle which we can calculate as follows:

Pythagoras Theorem:

a^2+b^2=c^2

(2)^2+(3)^2=c^(2)

4+9=c^2

Square root 13 = c

c=3.6km (1dp)

The total displacement is 3.6km and is in the approximate direction of South East (because he travelled east and south).

Hope this helped!

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Early treatment for mental illness involved a0 because doctors believed that doing this would drain the mental illness out of the person’s body.

Answers

For the answer to the question above asking, if early treatment for mental illness involved a0 because doctors believed that doing this would drain the mental illness out of the person’s body.
I think you are asking f this is true or false. This statement is true.
That was what doctors believed.

Define circular motion and give some examples.

Answers

"Circular motion" is motion in a circular path.

-- Any point on the tire of a bicycle or a car that is moving.

-- Any point on the hour, minute, or seconds-hand of an 'analog' clock.

-- The ball in the roulette wheel before it comes to a stop.

-- Any point on the rim of the Wheel of Fortune before it stops.

-- Any point on any propeller of a windmill, when the wind is blowing.

$\green{\huge{\red{\boxed{\green{\mathfrak{QUESTION}}}}}}$

Define Circular motion and its types

$\huge\green{\boxed{\huge\mathbb{\red A \pink{N}\purple{S} \blue{W} \orange{ER}}}}$

${ \red{ \bold {\mathbb {\textit{Circular \: motion}}}}}$

MOTION OF THE BODY CIRCULAR PATH IS CALLED CIRCULAR MOTION

FEW IMP POINTS ABOUT IT :-

‌A tengential is always responsible for change in speed
‌If the Direction of acc and velocity is same then body's speed inc
‌If they r in oppsite direction then Body's speed dec .
‌If speed becomes constant then tangential acc become zero .
‌By the basis of tangial acc the circular motion is divided into two types uniform circular motion and non uniform circular motion

${ \blue {\bold{UNIFORM \: CIRCULAR}}} \n \green{ \bold{ MOTION}}$

‌when object in a circular path in a constant speed or constant circular speed is called uniform circular motion.
‌In case of uniform circular motion acc tendial will be zero
‌In case of uniform circular motion acc centripetal will be equal to net acc.

${ \green{ \bold{ NON UNIFORM}}} \n {\blue{ \bold{CIRCULAR \: MOTION}}}$

‌Centripetal acc is not equal net acc
‌Circular acc and tendial acc is not equal to zero .

$\pink{ \huge {\bold{EXAMPLES \ratio- }}}$

Earth revolving around the sun is an example of uniform circular motion
Spinning top rotation on its own axis is example of non uniform circular motion
Rotating/ moving blades of fan etc
a rotating stone lied to a rope

In a physics experiment, two equal-mass carts roll towards each other on a level, low-friction track. One cart rolls rightward at 2 m/s and the other cart rolls leftward at 1 m/s. After the carts collide, they couple (attach together) and roll together with a speed of __________. Ignore resistive forces.a. 0.5 m/sb. 0.33 m/s
c. 0.67 m/s
d. 1.0 m/s
e. none of these

Answers

Answer:

The correct answer is option a.

Explanation:

Conservation of momentum :

$m_1u_1+m_2u_2=m_1v_1+m_1v_2$

Where :

$m_1, m_2$ = masses of object collided

$u_1,u_2$ = initial velocity before collision

$v_1,v_2$ = final velocity after collision

We have :

Two equal-mass carts roll towards each other.

$m_1=m_2=M$

Initial velocity of $m_1=u_1=2 m/s$

Initial velocity of $m_2=u_2=-1 m/s$ (opposite direction)

Final velocity of $m_1=v_1=v$ (same direction )

Final velocity of $m_2=v_2=v$ (same direction)

$M* 2 m/s+M(-1 m/s)=Mv+Mv$

$1 m/s=2v$

v = 0.5 m/s

rg135

The speed of the carts after their collision is 0.5 m/s.

How long does water evaporation take? What factors influence it?

Answers

there is no certain time on how long it takes. Because the factors will always be different and the factors heavily affect the evaporation time. Some factors include: humidity, heat, how the sun is visible (whether clouds are covering it or not)

There is not any fix time for evaporation...every liquid has different boiling point....when any liquid boils completely then it start evaporating.

Six factors that influence evaporation are :-
(1) Wind assists evaporation
(2) Heat assists evaporation
(3) Increase in surface area exposed assists evaporation
(4) Dryness assists evaporation
(5) Rate of evaporation depends upon the nature of the liquid
(6) Vapor pressure

If you had two forces, one with a magnitude of 25 N and the other with a magnitude of 100N, what would be the maximum net force these forces could exert on an object? How would these forces have to be applied in order to exert this maximum net force?

Answers

Two force yield a maximum effectwhen in the same direction.

When they are in the same direction, they can be added : the resulting force will be 100+25=125 N

Help Please ! A fisherman casts his lure at an angle of 33 degrees above the horizontal. The lure reaches a maximum height of 2.3 m. Assuming no frictional forces, what was the initial velocity the fisherman gave the lure when he cast it? 12.34 m/s

28.45 m/s

34.91 m/s

21.29 m/s