A mass is placed at the origin

PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

2\,\text{kg}

mass is placed at the origin. A

3\,\text{kg}

mass is placed on the positive

y

-axis at

(0,\;0.30\,\text{m})

, and a

4\,\text{kg}

mass is placed on the positive

x

-axis at

(0.40\,\text{m},\;0)

, all in vacuum. Find the magnitude and direction (angle with the

+x

-axis) of the net gravitational force acting on the

2\,\text{kg}

mass. (Take

G = 6.67\times10^{-11}\,\text{N\,m}^2\text{/kg}^2

.) (a)

5.6\times10^{-9}\,\text{N}

37^\circ

above the

+x

-axis (b)

5.6\times10^{-9}\,\text{N}

53^\circ

above the

+x

-axis (c)

2.8\times10^{-9}\,\text{N}

53^\circ

above the

+x

-axis (d)

5.6\times10^{-9}\,\text{N}

53^\circ

below the

+x

-axis