Question

urgent !!!





What will be the effect on the maximum height of a projectile when its angle of projection is changed from 30 to 60, keeping the same initial velocity of projection?





What does the area of the following graphs represents? i) Acceleration- time graph ii) speed- time graph.



Draw the graph of variation of potential energy stored in a spring as a function of extension.



Show graphically how acceleration due to gravity varies as when you move from the center of the earth to a great height above the surface of the earth.







A body is moving along a circular path such that its speed always remains constant. Should there be force acting on the body? Explain.



What condition should be satisfied for vectors to be equal?



What is the angular speed of a fly-wheel, making 120r.p.m?



Two satellites of masses 3m and m orbit the earth in circular orbits of radii r and 3r respectively. What is the ratio of their orbital speeds?







The bob of a pendulum is released from horizontal position. If the length of the pendulum is 1.5m, what is the speed with which the bob arrives at the lowermost point? Given that it dissipated 5% of its initial energy against air resistance.



Write the dimensions of a/b in the relation P= (a-t2)/bx where p is pressure, t is time and x represents for distance.



The change in the value of g at a height h above the earth is same as at a depth d below it. If h and d are small as compared to the radius of the earth, what is the ratio h/d?

Answer 1

Maximum height will increase as angle changes from 30 to 60 degrees
acceleration-time graph velocity and speed-time graph displacement