Obtain with what initial velocity were the keys thrown

Reference no: EM13667245

A learner throws a set of keys vertically upward to his fraternity brother, who is in a window 3.60 meter above. The brother's outstretched hand catches the keys 1.20 second later.

(a) Obtain with what initial velocity were the keys thrown?

m/s

(b) Find the velocity of the keys just before they were caught? (Take upward as the positive direction.)

m/s

Reference no: EM13667245

Questions Cloud

Find how much work is done by the pushing force : A 11.0 kilogram box is being pushed from the bottom to the top of a frictionless ramp. Find how much work is done by the pushing force

Find how much work does this force do : A force does +130 Joule of work when it acts on a moving object and its direction is in the similar direction as the object's displacement. Find how much work does this force do

Observer in front of the sources hears no sound : Two adjacent sources each emit a frequency of 800 Hz in air where the velocity of sound is 340 m/s. How much farther back would source 1 have to be moved thus that an observer in front of the sources hears no sound?

Find what constant acceleration does she need : In order to pass a physical education class at a university, a student must run 1.0 meter in 11.5 minute. Find what constant acceleration does she need

Obtain with what initial velocity were the keys thrown : A learner throws a set of keys vertically upward to his fraternity brother, who is in a window 3.60 meter above. Obtain with what initial velocity were the keys thrown

What is their common velocity after the collision : An object of mass 2 kg is moving east at 5 m/sec and collides with an object of 1 kg mass moving west at 4 m/sec. The objects stick together. What is their common velocity after the collision. How much kinetic energy is lost in the collision?

Methods to find the speed of each ball when each hits ground : A ball of mass 2 kg is thrown by an initial velocity of 5 m/se cat an angle of 40o above the horizontal, from the edge of a building 9 m high. At the same instant another ball of mass 4 kg is thrown from the same height at the similar speed at an ang..

Find with what initial velocity must she dives : Skeletor decides to test the law of gravitation by dropping Man-At-Arms off the top of 808 meter high Snake Mountain in Eternia and timing find how long it takes before he hits the ground. Find with what initial velocity must she dives

Several teenagers swim toward a rectangular : Several teenagers swim toward a rectangular, wooden raft that is 2.10 m wide and 2.50 m long. If the raft is 7.50 cm thick, how many 75.0kg teenage boys can stand on top of the raft without the raft becoming submerged? Suppose the wood density is 650..

User Account

All Pages