A person weighs 63 lb. The acceleration of gravity is 9.8 m/. Determine her weight in newtons. Answer in units of N 2. Determine her mass in kilograms.
Answer in units of kg.

Work out sian speed for the first 30 minutes of her journey. give your answer in km/h.

During a medieval siege of a castle, the attacking army uses a trebuchet to hurl heavy stones at the castle walls. if the trebuchet launches the stones with a velocity of at an angle of 50.0°, (a) how long does it take the stone to hit the ground? (b) what is the maximum distance that the trebuchet can be from the castle wall to be in range? (c) how high will the stones go? show all your work.

How are positive ions different from neutral atoms