تابع : كم سوال فيزيائي
 

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السوال الاول
A teenis ball travels the full length of the court, 24 meters, in 0.5 second. what is its average speed


السوال الثاني


A 5-kg flower-vase, accidentally falls from the balcony of a high builiding , resches apile of sand on the ground in 3 seconds

a)neglecting air resistance, what is the vase,s speed when it hits the sand

b) what is the vase,s average speed over the 3 seconds

c)what is the height of the balcony above ground



السوال الثالث
A horizontal force of 100 n pushes a box across a flower at a constant speed
a(what is the net force acting of the box
b)what is the force of friction on the box

مشكورين مقدما

رد: تابع : كم سوال فيزيائي
 

i will answer Q:1 for u and give u hints for other two questions.

Question 1

Average Speed = Distance / Time = 24 / 0.5 = 48 m/s



Question 2

for part a)

when any object reaches its maximum hieght then the velocity is zero.

for part b )

as i told you before that average speed is equal to the distance travelled divided by the time taken.


part c )

use the free fall equation to find out the hieght of the building.


Question 3


for part a ) to find the net force you have to know all the forces that are acting on the box , you have the horizontal force given , you have the frictional force that is directed to the opposite direction of box's movement and finally you have the wight of the box directed downwards .
add up all these forces together to get the net force.


part b ) you found it in part a right check it.

رد: تابع : كم سوال فيزيائي
 

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