Which of the following is the evidence to show that there must be a force acting on the earth and directed towards the sun?

$A$ body projected horizontally moves with the same horizontal velocity although it is under the action of the force of gravity,why?

$(i)$ Seema buys a few grains of gold at the poles as per the instructions of one of her friends. She hands over the same when she meets her at the equator. Will the friend agree with the weight of gold bought? If not,why?
$(ii)$ If the moon attracts the earth,why does the earth not move towards the moon?

Show that if the earth attracts two bodies $A$ and $B$ placed at the same distance from the centre of the earth with the same force,then their masses are equal.

If the density of a planet is doubled without changing its radius,how does $g$ on the planet change?

$A$ bomb is released from an aircraft. Its trajectory is: