A boy throws a stone vertically in the air with an initial speed of 40 m/sec. at the instant the stone is thrown, a monkey at the top of a tree h m high falls freely. How long will it take for the stone to hit the monkey if they meet at a point mid way between the ground and the top of tree?

1 sec

Explanation:

Using 1st equation of motion you can get the value of time and this will be 2.0 secs for height "h" but we wanna find for "h/2" just divide your time by 2 also. You will get your answer.

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards

this is an example of "committed" time.

committed time, as contracted time, takes need over essential and available time since it is seen as profitable work. it alludes to the time allotted to keep up a home and family. at the point when a man is commuting using committed time this individual may feel that the drive is an obligation to family, for example, strolling youngsters to class or driving a mate to work. contracted and committed time clients may feel that their commute could really compare to the commute of important or leisure time clients on the grounds that their commute is profitable work. in this manner, they might be more disposed to pick a mechanized method of movement.