Question

6:16 LTE a khanacademy.org Forces at an angle A box of mass m is pushed at an angle 0 by a force Fp along a frictionless surface. The box travels to the right with acceleration a What is the mass m of the box? Choose 1 answer: asin Check 西卬。

Answer 1

Since Force F_p is acting at an angle ,we have to split it into its components

Given the surface is frictionless ,so we don't need sine component of force F_p

The force that causes acceleration is cosine component of Force F_p

Net Force =Mass*acceleration

$F_{p}cos\theta =ma$

Mass, $m=\frac{F_{p}cos\theta }{a}$

ANSWER: Option D. ${\color{Red} \frac{F_{p}cos\theta }{a}}$

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