Question

A body is projected with a speed of 40 m/s vertically up from the ground. What is
the maximum height reached by the body? What is the entire time of motion? Whz
is the velocity at 5 seconds after the projection? Take g=10m/s (AS)
​

Answer 1

Answer:

Acceleration of the body = -10 m/s². [∵ The body is thrown against the gravity]. ∴ S = 80 m. Hence, the maximum height reached by the body is 80 m.

Answer 2

Answer:

Radius of sphere=2cm =2/100=0.02 m

Volume of the sphere=4/3

.

r³

=4/3× 22/7×0.02×0.02m³=0.000704/21 m³

Mass of sphere=0.05kg.

Relative density of sphere=density ×10³

=0.05/0.000704\21 ×10

=0.05×21/704×10-6×10³

=1.05×10³/704×10-6

=1.05×10³±6/704=1.05×109/704=1.49×106

Relative density of sphere= 1.49×106 kg/