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Mechanics
Page 9
Questions (40,202)
A block and tackle with a velocity ratio of 5 is used to raise a mass of 25kg through a vertical distances of 40cm at a steady
10 answers
asked by
Rose
5,769 views
To measure the static friction coefficient between a 1.6-kg block and a vertical wall, the setup shown in the drawing is used. A
5 answers
asked by
Donna
7,825 views
A physics book of unknown mass is dropped 5.00 m. What speed does the book have just before it hits the ground? Assume that air
4 answers
asked by
Anonymous
2,818 views
A small block with a mass of m = 0.120 kg is attached to a cord passing through a hole in a frictionless, horizontal surface.
5 answers
asked by
Sonya
3,879 views
A street light is mounted at the top of a 6 meter tall pole. A man 2m tall walks away from the top with a speed of 1.5 m/s along
5 answers
asked by
Erich
2,973 views
A constant force acts on a 5.0 kg object and reduces its velocity from 7.0 m/s to 3.0 m/s in a time of 3.0 s. Find the force.
5 answers
asked by
Kiana
2,997 views
A body weighs 0.30N in air. 0.25N when fully immersed in water and 0.27N in a liquid. Calculate the relative density of the
5 answers
asked by
Rejoice
2,390 views
If you drop a stone into a well that is d = 128.0 m deep, how soon after you drop the stone will you hear it hit the bottom of
7 answers
asked by
tommy
3,011 views
A diver in midair has an angular velocity of 6.0 rad/s and a moment of inertia of 1.2 kg·m2. He then pulls is arms and legs
5 answers
asked by
jason
6,470 views
A bowling ball weighing 71.2 N is attached to the ceiling by a 3.80 m rope. The ball is pulled to one side and released; it then
10 answers
asked by
Sarah
9,399 views
The cannon on a pirate ships shoots cannon balls with a speed of 350m/s (the muzzle velocity). The cannon can be adjusted to
5 answers
asked by
Kira
1,680 views
A locomotive is pulling an empty freight car with a constant acceleration on a horizontal surface. The mass of the locomotive is
4 answers
asked by
bub
2,723 views
A 1200 lb sleigh is pulled along a horizontal surface at uniform speed by means of a rope that makes an angle of 30 degrees
5 answers
asked by
Lian
3,955 views
You are riding your bike and the tire has a radius of 0.33 m and mass 1.5 kg rotating at 98.7 rad/s. You just notice you are
4 answers
asked by
Anonymous
4,184 views
A student with mass 50 kg jumps off a high diving
board.Using 6.0×1024 kg for the mass of the earth, what is the acceleration of
4 answers
asked by
jasika
4,188 views
If α = 40°, β = 60°, and M = 4.0 kg, determine the tension in string 1 & 2.
-------/ / 1 /2 / . . . Blockmass Alpha is on the
4 answers
asked by
joy
4,555 views
A roller coaster car of mass 400kg starts from rest at point A and passes the point B with a speed of 3m/s.if the distance from
4 answers
asked by
wallacenjovu
1,909 views
a mover uses a ramp to pull a 1000 newton cart up to the floor of his truck 0.8 meters high if it takes a force or 200 newtons
7 answers
asked by
hunter
4,517 views
An object is thrown upward at v0 from the surface of a small spherical planetoid of mass M and radius R When the object is a
5 answers
asked by
colton
1,642 views
A golf ball and a bowling ball both move at the same speed and collide head on do you think will move backward when they hit?
4 answers
asked by
l
1,056 views
Four 7.5 kg spheres are located at the corners of a square of side 0.60 m. Calculate the magnitude and direction of the
9 answers
asked by
myra
10,118 views
a machine gun fires 10 bullets persecond into a target. each bullet weights 20 gm and had a speed of 1500 m per second .find the
6 answers
asked by
sunny
2,340 views
A force of 80N acts on a body initially at rest and moves 72m in 6s. If the force is removed after 6s calculate how far the body
5 answers
asked by
jay
1,461 views
"Two springs are hooked together and one end is attached to a ceiling. Spring A has a spring constant of 25N/m, and spring B has
5 answers
asked by
Stuck
3,005 views
A stunt pilot in an air show performs a loop-the-loop in a vertical circle of radius 3.70 103 m. During this performance the
4 answers
asked by
Bust Nuttington
5,026 views
What is the average power output of a weightlifter who can lift 260 kg to a height of 1.9 m in 1.8 seconds?
5 answers
asked by
Ash
6,676 views
3. A person exerts a force of 55 N on the end of a door 74 cm wide. What is the magnitude of the torque if the force is exerted
4 answers
asked by
Bobby
11,713 views
Calculate the work done by a stone mason lifting a stone of mass 15kg through a height of 2m.Take g=10N/Kg
5 answers
asked by
Peter
1,685 views
determine the effort required to lift a load of 100N using a single fixed pulley
5 answers
asked by
irene
767 views
a uniform half metre rule is freely pivoted at the 20 cm mark and its balance horizontaly when a body of mass 30g is hung 5cm
6 answers
asked by
Anonymous
2,482 views
The driver accelerates a 240.0 kg snowmobile, which results in a force being exerted that speeds up the snowmobile from 6.00 m/s
5 answers
asked by
Shawn
8,253 views
A child and sled with a combined mass of 50.0 kg slide down a frictionless hill that is 7.34 m high. If the sled starts from
4 answers
asked by
lili
4,991 views
The motor for an elevator can produce 2200 W of power. The elevator has a mass of 1100 kg complete with contents . At what
5 answers
asked by
Melissa
3,112 views
a simple pendulum has a period of 4.50secs,when the length is shortened by 1.2m the period is 2.50secs. calculate the original
4 answers
asked by
pauline
1,474 views
An object A of mass 20kg moving with an initial velocity of 3m/s makes a head on collision with object B mass 10kg moving with a
5 answers
asked by
Chris
2,650 views
In the 1950s, an experimental train that had a mass of 3.30 104 kg was powered across level track by a jet engine that produced
6 answers
asked by
dan
4,592 views
A cord passes over a weightless and frictionless pulley. Masses of 200 g and 300 g are attached to the ends of the cord. Find
5 answers
asked by
Sean
2,713 views
A 52kg ice hockey player moving at 11m/s slows down and stops over a displacement os 8.0m.
Calculate the net force of the skater.
6 answers
asked by
Mike
2,979 views
A 4.0-kg cylinder of solid iron is supported by a string while submerged in water. What is the tension in the string? The
5 answers
asked by
Anonymous
5,942 views
A person pushes a 14.0-kg lawn mower at constant speed with a force of F = 88.0 N directed along the handle, which is at
an angle
5 answers
asked by
mrmr
2,871 views
A student places her 500 g physics book on a frictionless table. She pushes the book
against a spring, compressing the spring by
4 answers
asked by
anonymus
5,924 views
A 10,000 kg frieight car is rolling along a track at 3.0 m/s. Calculate the time needed for a force of 1000 N to stop the car.
5 answers
asked by
michaela
1,804 views
A spring stretches by 6cm when supporting a load of 15N ,what load would make the spring extend by 25mm
7 answers
asked by
Mish
1,078 views
a uniform rod 100cm long and weighing 50N is supported on a horizontal position on a fulcrum which weights of 80N and 100N
5 answers
asked by
nicolyan
2,656 views
A 60 kg boy on roller skates moves with a speed of 5 m/s. He runs into a 40 kg girl on skates. Assuming they cling together
5 answers
asked by
judy
5,056 views
1) A 2 . 3 kg object moving at 7.3 m/s collides inelastically with a 4.0 kg object which is initially at rest.
What percentage of
5 answers
asked by
quaviz
3,000 views
A uniform pencil AB weiging 40g can be balanced holizontally on a knife edge at 2cm at the end where a mass of 60g is hung from
7 answers
asked by
Miso
1,657 views
A snooker ball with a mass of 0.3kg moving at 2.5m/s collides with another ball of 0.2kg mass and moving in the same direction
5 answers
asked by
Sarah
1,554 views
A body of mass 500g suspended from the end of a spiral spring which obeys Hooke's law, produced an extension of 10cm. If the
4 answers
asked by
Fynface
1,583 views
In its approach to an airport runway, an airplane of mass 1.24 x 10^5 kg has a velocity of 75.5 m/s [11.1 degrees below the
4 answers
asked by
Jordge
1,503 views
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