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Question1
An old oaken buck of mass 6.75 kg hangs in a well at the end of a rope. The rope passes over a frictionless pulley at the top of the well, and you pull horizontally on end of the rope to raise that bucket gradually a distance of 4.00m.
(a) How much work do you do on bucket in pulling it up?
(b) How much work does gravity do on bucket?
(c) What is total work done on the bucket?
Question2
A 6.7 g bullet is fired into a 1.3 kg ballistic pendulum. The bullet come out from block with a speed of 137 m/s, and block rises to a greatest height of 10 cm.
find out an initial speed of the bullet. The acceleration due to gravity is 9.8 m/s2.
Answer should be in units of m/s
A skyscraper has 550 windows that each have length 2.50m and height 2.0m when the temperature is 25C. the windows are made of single-pane glas of thickness 1/2"(1.27com) mounted in an aluminum frame.
Two masses are connected by a light string that goes over a light, frictionless pulley. determine the maximum height attained by the 2.1-kg mass
A boat's mast is held by two cables, one attached to the front of the ship and the other to the back. What is the force acting upwards on the mast exerted by the boat at the bottom of the mast
A 8.85 ?C point charge is glued down on a horizontal frictionless table on the right. If is tied to a -6.65, Find the tension in the wire, What would the tension by if both charges were negative
A skateboarder, starting from rest, rolls down a 13.1-m ramp. If the ramp is inclined at 26.5 ° with respect to the ground, what is the component of her acceleration that is parallel to the ground
An airplane pilot wishes to fly due west. A wind of 80.0is blowing toward the south. What is the speed of the plane over the ground
Two long, parallel wires carry currents of 0.245 A in the same direction. If the wires are 0.034 m apart, what is the force per unit length between the wires
A nichrome toaster wire, initially at room temperature, carries 2.72A immediately after it's turned on. What's the temperature of the nichrome then
A father racing his son has half the kinetic energy of the son, who has one-third the mass of the father, What is the original speed of the father
The bullet passes right through and emerges on the other side with a speed of 100 m/s, and the saxophone is given a speed of 4.8 m/s.
The howler monkey is the loudest land animal and can be heard up to a distance of 1.3km. determine The acoustic power emitted by the howler
A dolphin leaps out of the water at the angle of 46° above the horizontal. The horizontal component of the dolphin's velocity is 9.40 m/s. Find out the magnitude of the vertical component of velocity.
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