(a) Calculate the tension (in N) in a vertical strand of spiderweb if a spider of mass 9.00 x 10-5 kg hangs motionless o... 查看全部
Helicopter blades withstand tremendous stresses. In addition tosupporting the weight of a helicopter, they are spun at r... 查看全部
A skier starts from rest at the top of a frictionless incline of height h= 32.0 m, as shown in the Figure. At the bottom... 查看全部
11) An initially stationary object is pulled with force of F = 50 N as shown up to point B and then force is removed. If... 查看全部
You walk the first 0.20 km at 1.0 m/s and the next 0.20 km at2.0 m/s. What is your average speed? (Be careful.)Your aver... 查看全部
You sing a suitably chosen tune at 84 beats per minute and walk(in time, exactly one step per beat) with a step length o... 查看全部
he terminal velocity of a person falling in air depends upon theweight and the area of the person facing the fluid. Find... 查看全部
A ball is kicked with an initial velocity of 12 m/s in thehorizontal direction and 18 m/s in the vertical direction. (As... 查看全部
When a capacitor, in RC circuit, is fully charged, the current through the resistor is Select one: equal to the current ... 查看全部
(a) A 19.0 kg child is riding a playground merry-go-round thatis rotating at 30.0 rev/min. What centripetal force (inN) ... 查看全部