Mechanics | Relativity Answers

4. Two young boys are playing at the seesaw that is 3.90m in length. The first boy, who weighs 20N, sits on one end of the seesaw that is 1.5m from the midpoint. The other boy, who weighs 22N, sits on the other end. If the seesaw is to be in equilibrium, how far must the second boy sit from the midpoint? If the first boy is to sit 1.2m from the midpoint, where should the second boy sit to maintain the equilibrium state of the seesaw?

3. In an experiment to prove the concept of the second condition of equilibrium, a boy balanced the meterstick on a peg board exactly at the midpoint. He then put a cylindrical metal at the 10cm mark and moved the meterstick to balance it again. If the meterstick weighs 12g, how much does the cylindrical metal weighs?

2. A cargo is to be transferred to the ship using cables that makes an angle of 12 degrees above the horizontal. If the maximum safe tension on the cable is 1,633.33N, what must be the maximum safe weight of the cargo so that the cable can support it?

A tarpaulin weights 15.70N and is hanged on the gate of the school using two cable wires, which makes an angle of 35 degrees above the horizontal. If the tarpaulin is in equilibrium state, how do you compare the tensions on the cable? What must be the tension of the cables so that it will support the weight of the tarpaulin? What is the direction of the tensions?

A stone is dropped vertically from the top of a tower of height 40 m. At
the same time a gun is aimed directly at the stone from the ground at a
horizontal distance 30 m from the base of the tower and fired. If the
bullet from the gun is to hit the stone before it reaches the ground, the
minimum velocity of the bullet must be, approximately..?

A hill with a slope of 35° is situated at the top of a cliff that is 44݉ high. A solid disk, beginning at rest, rolls down the hill. The length of the incline is 12.55݉. If a kid is standing 20݉ away from the cliff, will the disk hit him?&

water flows at a speed 5cm /s through a pipe of radius 2cm ,the viscosity of water is 0.001 pl .the reynolds number and the nature of flow are respectively ?????????????????/

a large vessel of height H ,is filled with a liquid of density D ,upto the brim .a small hole of radius r is made at the side verticle face ,close to the base .the horizontal force is required to stop the gushing of liquid ??????????????????

a 20 cm long capillary tube is dipped in water .the water rises upto 8cm .if the entire arrangement is put in freely falling elevators the length of water column in capillary tube will be ????????????

What is your average velocity if you drive a
distance of 306 km at a speed of 40 km/h, then
the same distance at a speed of 62 km/h?