Question

1. A body is projected vertically at a speed of 40ms-1 a, At what times is it 5m above the ground. b, A second body is projected at an angle of 30° to the horizontal with a speed of 50ms- 2secs later. What is the height of the first body when this new body reaches maximum height? 50ms-1

Answer 1

Answer:

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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/m³