Recent content by Douna2nd

Aahh! Thank you ! :D

Why is the velocity zero in the second case? The car will be moving but moving slowly

V^2 =Vo^2 +2 a S I solved the problem in a wrong way in the exaaaaam! :O

It was in my final exam today actually and I did in the first case S=Vot + 1/2 a t^2 and I have the distance, the intial velocity and time and I got the a then in the second case I didn't actually know what to do but I assumed that S =0 and used the same rule used above and got the acceleration...

A car is traveling at 10 m/sec. When it is 40 meters from a crosswalk, there is still 3 seconds before the light changes to red. The driver has two choices: the first is to accelerate to reach the crossing before the light changes to red and the second is to try to stop at the light. What is the...

The problem says " Two forces of magnitudes 12 and 15 Newton are applied to a point and the tangesnt of the angle between them is -3/4. Find the resultant of the two forces and the measure of its angle of inclination on the first force. In the answer it says that the theta belongs to the...

The pressure on the small piston is equal to the pressure of the large piston so I'm going to calculate the pressure of the large piston by the rule F/A force =mg where g is the force of gravity and area = pi diameter square over 4 ?

The two hydraulic press are joined by a lever, the ratio between the SA of the first press is 1:100 and of the second is 1:50, find If a force 10 Newton acts on the small piston of the first press a) the load b) mechanical advantage What is the load? Is it mass or force and which force And...

Area = pi times diameter square over 4?? And I'm going to put the diameter of the larger pistol eh?

A car service station uses a hydraulic car lift, the diameter of its pistons are 0.02 m and 0.32 m calculate the pressure required to raise a car of mass 1800 KG I don't know how to get the area ?

i want to delete the post ..

ahhaaaaaa ! Got it! Thanks

and if i did place my finger 9.23 away wouldn't the string make a second harmonic tone because it vibrates from the right and left of my finger ?

i know this feels stupid but if i placed my finger at the end of the string when it's 40 cm it will produce frequency of 500 hz ? while if i placed my finger at 9.23 cm away from the end it will prodce frequency of 650 ?

okay so i got L2 v1/v2=n1/n2 * 2L2/2L1 *√FT1/FT2 * √ML2/ML1 and i crossed mass per liter and forces of tension and number of segments so it's v1/v2= L2/L1 500/650=L2/40 L2=30.77cm but that's the length of the segment, still where should i place my finger on the string ? I searched about the...