A50g arrow is fired vertically downward to a target 10m below. if it was released from the bow with a speed of 50m/s, and it lodges itself 15cm into the ground determine the average force that the arrow exerts on the ground ignore air resistance

Speed of the arrow just before it will hit the ground can be calculated by energy conservation

by solving above equation

now this will lodge itself 15 cm into the ground

so after lodging itself to 15 cm the speed of arrow becomes zero

now we will have

Now by Newton's II law net force is given as

concave lenses are used here. they spread the light out before it reaches the convex lens in the eye, therefore letting the image focus directly on the retina. hyperopia is known to you probably as farsightedness.

when the use of electricity burdens the fuse and miniarure circuit beakers and there is a possibility of a fuse then they automatically cut off the electricity supply to your homes and after you fix the problem u jzt switch it on and it continues the supply of electricity to ur homes