Kinematics Question 214

Question: A stone is thrown with an initial speed of 4.9 m/s from a bridge in vertically upward direction. It falls down in water after 2 sec. The height of the bridge it’s [AFMC 1999; Pb. PMT 2003]

Options:

A) 4.9 m

B) 9.8 m

C) 19.8 m

D) 24.7 m

Show Answer

Answer:

Correct Answer: B

Solution:

Speed of stone in a vertically upward direction is 4.9 m/s. So for vertical downward motion we will consider $ u=-4.9\ m/s $

$ h=ut+\frac{1}{2}gt^{2}=-4.9\times 2+\frac{1}{2}\times 9.8\times {{(2)}^{2}} $

$ =9.8\ m $



जेईई के लिए मॉक टेस्ट

एनसीईआरटी अध्याय वीडियो समाधान

दोहरा फलक