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3 years ago

What happens that a light ray if it incident on a reflective surface along the normal

Physics

1 answer:

evablogger [386]3 years ago

6 0

Most likely it will reflect off the surface and create a fire

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A reaction in a solution would proceed slowest when -

Zinaida [17]

the answer is A *but I am not sure*

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3 years ago

person throws a ball horizontally from the top of a building that is 24.0 m above the ground level. The ball lands 100 m down ra

juin [17]

Answer:45.24 m/s

Explanation:

Given

Height of Building h=24 m

Range of ball R=100 m

Considering Vertical motion of ball

using $y=u_yt+\frac{a_yt^2}{2}$

initial vertical velocity is zero therefore $u_y=0$

$24=0+\frac{9.8\times t^2}{2}$

$t=\sqrt{\frac{48}{9.8}}$

$t=2.21 s$

Now considering Horizontal Motion

$R=u_xt+\frac{a_xt^2}{2}$

$100=u_x\times 2.21+0$ , as there is no horizontal acceleration

$u_x=45.24 m/s$

6 0

3 years ago

Difference between acceleration and decceleration

mario62 [17]

acceleration is considered to describe an increase or positive change of speed or velocity But deceleation is considered to describe a decrease or negative change of speed or velocity

8 0

3 years ago

How much work do you do when you push a 400 kg car for 6 m with a force of 300 N? What is the car’s final speed if all your work

Anit [1.1K]

Answer:

Work=1800 J

Speed=3m/s

Explanation:

Work is product of force and distance moved, expressed as

W=Fd

Where F is force and d is distance in meters

Substituting 300 N for force and 6 m for d then

W=300*6=1800 J

Kinetic energy is given by

KE=½mv²

Where m is the mass and v is velocity

Here, KE=W hence

W=½mv²

Making v the subject then

$v=\frac {2W}{m}$

Substituting 1800J for W and 400 kg for m then

$v=\frac {2*1800}{400}=3m/s$

Therefore, velocity is 3 m/s

4 0

3 years ago

Why is change in speed

Lisa [10]

Forces affect how objects move. They may cause motion; they may also slow, stop, or change the direction of motion of an object that is already moving. Since force cause changes in the speed or direction of an object, we can say that forces cause changes in velocity. Remember that acceleration is a change in velocity.

6 0

3 years ago

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