A recreational motor boat on a lake is towing a 70-kg water skier. She holds on to a nylon tow rope of length 12 m with a cross sectional area of 2.0 10-5 m2. As the boat and she starts moving, she is subjected to a horizontal drag force of 125 N from the water. If she moves with an acceleration of 0.85 m/s2, by how much does the rope stretch? Young's modulus for nylon is 3.7 109 N/m2.

Glass has a hardness that is in the middle of the hardness scale. what is the hardness of glass?

The electric field direction is defined by the direction of the force felt by (select one of the following answers): 1. a negative charge. 2. a positive charge. 3. both positive and negative charges.

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.