An arrow is fired directly horizontal off a cliff that is 12.3 meters tall with a velocity of 14.7 m/s. What is the range of the arrow?

When you drop a pebble from height a it reaches the ground with speed v if there is no air resistance. from what height should you drop it so it will reach the ground with three times the speed? (a) 9m (b) 3m (c) 6m (d) 18m

What are two different ways you could find the value of a? explain these methods.

Give one example to show that when substances are mixed, it may result in a chemical or a physical change depending on the conditions.