Mechanics | Relativity Answers

A frog in a hemispherical bowl, as shown below, just floats in a fluid with a density of 1.29 103 kg/m3. If the bowl has a radius of 5.36 cm and negligible mass, what is the mass of the frog?

A raft is constructed of wood having a density of 460.0 kg/m3. The surface area of the bottom of the raft is 5.9 m2, and the volume of the raft is 0.56 m3. When the raft is placed in fresh water having density 1.0 103 kg/m3, how deep is the bottom of the raft below water level?

A large elevator uses a diesel engine with lift power P of 500kw to pull a cable lift which has a 1000 newton pull Fdrag when empty. The total vertical lift distance (d) is 400 meters. How many 60kg boxes can the elevator accommodate at one time if the vertical speed (v) of the elevator is 2m/s®?

an object is thrown upwards from a height of 40.0 m. A second object is dropped from that height 3.0 s later. What must be the initial speed of the first ball if both are to hit the ground at the same time?

A load of 10N extends a wire OP length 5m by 5mm.IP, the cross-sectional area of the wire is 2.5mm.Calculate its young's modulus.

A man drove 220km in 3.5 hours. Part of the trip was at 60 km/h and the rest at 65 km/h. Find the time spent at a slower rate

the horizontal distance covered by a projectile in motion is maximized at which angle?

in projectile motion, the initial horizontal velocity is ...... the final horizontal velocity. (what is the blank)

what is the vertical acceleration in projectile motion?

A machine of velocity ratio 5 requires 1000j of work to raise aload of 450N through a vertical distance 2m. calculate the efficiency and mechanical advantage of the machine