Question

Consider a boy on a trolley who throws a ball with speed 20 m/s at an angle 37º with respect to trolley in direction of motion of trolley which moves horizontally with speed 10 m/s then what will be maximum distance travelled by ball parallel to road –

• A. 20.2 m
• B. 12 m
• C. 31.2 m
• D. 62.4 m

Answer 1

Answer: (D)

62.4 m

Answer 2

T = $\frac{2 \times 20\sin 37º}{10}$ = 4 × $\frac{3}{5}$ sec.

Range = R = $\frac{12}{5}$ × (20 cos 37⁰ + 10)

$\frac{12}{5}$ × (20 ×$\frac{4}{5}$ + 10) = 26 × $\frac{12}{5}$ = 62.4 m