Question

zuzu!!!!!!

Answer 1

@Abhisar for the first question this is what i did...

Answer 2

first i figured out the normal force the earth was exerting the block of wood.

Normal force = mass x gravity
normal force = 0.72Kg X 9.80m/sec^2
Normal force = 7.05N This is my normal force.

Answer 3

from here i used te frictional formula to get my force of friction.
Force of friction = μk x 7.05N
Force of friction = 4.51N i got my friction.

Answer 4

Nor that i ad my frictinal force and normal force. i plugged them into te formula to get my net force
Applied force - frictional force = m x change in velocity/time
Applied force - 4.51N = 0.72Kg x 0.8m/sec^2
Applied force = 4.51N + 0.57N
Applied force = 5.08N
HEre is te answer to my first question....

Answer 5

i just wanna know to find the net force of the block of wood.....
my actual force is 5.08N and frictional force is 4.51N
Therefore the net force would be 5.08N - 4.51N = 0.57N right?!?!?!

Answer 6

net force = 0.57N?!?!?!?!

Answer 7

Actually the question says that table is smooth so that means frictional force will not act. In this case force on the block will solely due to the push of boy.

Since, block has a velocity of 1.6 after 2 seconds, its acceleration will be 0.8

Therefore, Force = 0.72 x 0.8 = 0.576 N

Answer 8

but bay did you read the last part of the question....."the kinetic friction is 0.64.

Answer 9

baby* "D

Answer 10

It's fine if you want to consider the friction in. the answer will still be same.

Answer 11

ok but to get the net force, do i subtract applied force from frictional force?!?!?!

Answer 12

i'm getting about the same answer so ....LOL

Answer 13

Net force = Applied Force - Frictional force.

Answer 14

ok thank you shooooooomuch i love you. :")

Answer 15

So, Applied Force = Net Force + Frictional force.

Answer 16

Note: In the first part we calculated the net force.
In second part we calculated the frictional force
Finally in the third part we calculate the applied force by adding net force and frictional force...

Answer 17

yes yes yes!!! :"D

Answer 18

c:

Answer 19

Thanks honey, i appreciate your effort....!!