Your medieval history class is constructing a trebuchet, a catapultlike weapon for hurling stones at enemy castles. the plan is to launch stones off a 71- m -high cliff, with initial speed 39 m/s . some members of the class think a 45 ∘ launch angle will give the maximum range, but others claim the cliff height makes a difference. what do you give for the angle that will maximize the range?

An object's buoyant force and weight mean the same thing.a. trueb. false

As a pendulum bob swings back and forth several times, the maximum height it reaches becomes less and less. this is because more and more of the pendulum bob's energy is being transformed into a. heat energy b. kinetic energy c. potential energy d. kinetic energy and potential energy

Identify the correct relation showing that the radius r of the orbit of a moon of a given planet can be determined from the radius r of the planet, the acceleration of gravity at the surface of the planet, and the time τ required by the moon to complete one full revolution about the planet. determine the acceleration of gravity at the surface of the planet jupiter knowing that r = 71 492 km and that t= 3.551 days and r= 670.9 × 10^3 km for its moon europa.