First slide

Projection Under uniform Acceleration

Question

A particle is projected with velocity $\vec{u} = 30 \hat{i} + 20 \hat{j}$ m/s. Then its range is (g = 10 m/s²)

Moderate

A
60 m
B
140 m
C
120 m
D
80 m

Solution

R = $\frac{2 (u \sin α) (u \cos α)}{g} = \frac{2 \times 20 \times 30}{10} m = 120 m$

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