The trap-jaw ant can snap its mandibles shut in as little as 1.3 10-4 s. in order to shut, both mandibles rotate through a 90° angle. what is the average angular velocity of one of the mandibles of the trap-jaw ant when the mandibles snap shut in 2.20 10-4 s?

You want to move a heavy box with mass 30.0 kg across a carpeted floor. you pull hard on one of the edges of the box at an angle 30∘ above the horizontal with a force of magnitude 240 n, causing the box to move horizontally. the force of friction between the moving box and the floor has magnitude 41.5 n . what is the box's acceleration just after it begins to move