Question Text
Question 1 :
A frog that jumps upwards is under the influence of gravity and accelerates at a constant rate.<br>If it has an initial upwards velocity of ${v}_{0}=5.00{m}/{s}$, approximately how far above the ground will it be when it has velocity $v=-2.50{m}/{s}$?
Question 4 :
(1) : In uniform circular motion the kinetic energy of the body is constant.<br/> (2) : In uniform circular motion the tangential force is zero.<br/>
Question 6 :
A stone is dropped from a rising balloon at a height of 300 m above the ground and it reaches the ground in 10 s. The velocity of the balloon when it was dropped is :<br/>
Question 7 :
If a ball is dropped from rest, it will fall 20m during the first two seconds. How far will it fall during the third and fourth seconds?
Question 8 :
A point moves with uniform acceleration and ${ v }_{ 1 },{ v }_{ 2 },{ v }_{ 3 }$ denote the average velocities in three successive intervals of time ${ t }_{ 1 },{ t }_{ 2 },{ t }_{ 3 }$ . Then, the relation $\cfrac { { v }_{ 1 }-{ v }_{ 2 } }{ { v }_{ 2 }-{ v }_{ 3 } } $ is<br>
Question 9 :
In Uniform circular motion direction of velocity is along the _______ drawn to the position of particle on the circumference of the circle.<br>
Question 10 :
The relation between time t and distance x is $t = a{x^2} + bx$ where a and b are constants. The retardation is ( if v is velocity of the particle ):