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Mechanics
Page 8
Questions (40,013)
a car is moving at a constant speed of 20m/s^-1. The force retarding its motion is 500N. Calculate the engine power of the car
6 answers
asked by
Olivia
1,672 views
A ball falls from a shelf. Assuming there is no friction, why is the conservation of mechanical energy independent of mass?
Mass
7 answers
asked by
Anonymous
3,593 views
A car is driven at a constant speed of 21 m/s (76km/h) down a road. The car's engine delivers 52 kW of power. Calculate the
5 answers
asked by
Einstein
5,726 views
A force of 300N lifts a mass of 120kg with help of lever whose length is 2.4 m.The distance between fulcrum and mass is
a) 40cm
10 answers
asked by
Ghulam muhammad
1,593 views
an astronaut on the planet zircon tosses a rock horizonally with a speed of 6.95 m/s. the rock falls through a vertical distance
5 answers
asked by
taylor
8,428 views
A 0.006-kg bullet traveling horizontally with a speed of 1.00 103 m/s enters an 21.1-kg door, imbedding itself 10.4 cm from the
7 answers
asked by
Ana
8,370 views
A man whose mass is 70 kg walks up to the third floor of a building. This is a vertical height of 12 m above the street level.
(a
4 answers
asked by
pakilina
4,038 views
The period of motion of an object-spring system is T = 0.474 s when an object of mass m = 296 g is attached to the spring.
(a)
4 answers
asked by
Ame
7,194 views
On a frozen pond, a 13.9 kg sled is given a kick that imparts to it an initial speed of v0 = 1.81 m/s. The coefficient of
5 answers
asked by
taylor
3,868 views
a 100N force is applied at an angle of 30 degrees horizontal to move a 15kg object at a constant speed for a horizontal distance
5 answers
asked by
Layne
7,919 views
An object falls freely from a height of 25m onto a roof of a building 5m high. Calculate the velocity with which the object
5 answers
asked by
Obaloluwa
2,063 views
The maximum load a beam will support varies directly with the square of the diagonal of the beam's cross section.A beam with
5 answers
asked by
Keonn'a
4,239 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
9,384 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
1,655 views
20.) A piano has been pushed to the top of the ramp at the back of a moving van. The workers think it is safe, but as they walk
4 answers
asked by
Anonymous
4,838 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
2,705 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
4,159 views
a man having a mass of 60 kg exerts a horizontal force of 200 newton in pushing a 90 kg object a distance of 60 meters along
5 answers
asked by
komal yaseen
4,175 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
4,538 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
2,985 views
A 1000-kg car is driving toward the north along a straight road at a speed of 20.0 m/s. The driver applies the brakes and the
5 answers
asked by
Christine
5,392 views
The Olympic diver completes 3.5 somersaults in 1.7 seconds. What is the average angular speed (in rad/s) of the diver?
5 answers
asked by
Joe
1,977 views
Hi, the following is a problem that concerns angular momentum:
Modern hard drives spin very fast! The part that holds the data is
5 answers
asked by
Grace
1,893 views
When a mass is attached to a vertical spring, the spring is stretched a distance d. The mass is then pulled down from this
4 answers
asked by
please help!!!!
1,705 views
A 45.7-kg boy on a swing moves in a circular arc of radius 3.80 m.At the lowest position, the child's speed reaches 2.78 m/s.
5 answers
asked by
khan
2,137 views
The coefficient of static friction between a heavy box and a ramp is 0.450, The weight of the box is 1200.0 N and the ramp has
4 answers
asked by
Ava
931 views
A 0.165-kg ball, moving in the positive direction at 10 m/s, is acted on by the impulse shown in the graph below. What is the
5 answers
asked by
Lisa
2,268 views
A 65 kg dancer leaps .32 m high.
a) With what momentum does the dancer reach the ground? b) What impulse is needed to make a
5 answers
asked by
Einstein
2,285 views
A uniform plank measures 2m long from it's end point A to point B. If the weight of the plank is 54N and it rests on a knife
4 answers
asked by
Blessed
692 views
You are playing with a yo-yo with a mass of 225 g. The full length
of the string is 1.2 m. (a) Calculate the minimum speed at
5 answers
asked by
kenny
748 views
A rock dropped from the top of a building takes 0.55 s to fall the last 50% of the distance from the top to the ground.How tall
6 answers
asked by
Anonymous
2,838 views
A body weight 0.3N in air,0.25N when fully immersed in water and 0.27N when fully immersed in liquid. calculate a. It's water
5 answers
asked by
Elias
480 views
At an instant when a particle of mass 80 g has a velocity of 25 m/s in the positive y direction, a 75g particle has a velocity
4 answers
asked by
ATT
1,822 views
an empty rubber balloon has mass 0.0120kg, the balloon is filled with helium of density 0.181 kg/m^3. the balloon is spherical
5 answers
asked by
Helen
3,047 views
A block of weight 3.8N is launched up a 30 degree inclined plane of length 2.25m by a spring with spring constant 2.35kN/m and
4 answers
asked by
Harold
4,077 views
A 20.0 kg block is being pushed forward on a flat surface with a force of magnitude 45.0 N against a frictional force of 13.0 N.
4 answers
asked by
Alyssa
1,759 views
a block and tackle system of pulleys consisting of 5 pulleys is used to raise a load of 500N through a height of 12m. if the
4 answers
asked by
faith
2,047 views
A particle P of mass 2gms moves on the X-axis and is attracted towards origin O with a force numerically equal to 8x. If it is
5 answers
asked by
Vijaya
3,599 views
A body falls freely from rest for a 6sec find the distance traveled in the last 6sec.
4 answers
asked by
Dave Ang
1,571 views
Aforce Of 4oN Is Used To Stretch Aspring Which Has Aspring Constant 350 N/m.How Much Energy Is Stored In The Spring?
7 answers
asked by
Exasu Amanuel
672 views
A stone of mass 20g is release from a catapult whose rubber has been stretched through 4cm, if the force constant of the rubber
12 answers
asked by
Justice
5,561 views
A stone is projected vertically upwards with a speed of 30ms from the top of a tower of height 50m. Neglecting air resistance
6 answers
asked by
josh
2,811 views
in the hydraulic machine shown, you observe that when the small piston is pulled down 10cm, yhe large piston is raised 1 cm. if
4 answers
asked by
john
5,943 views
A force of 40N stretches a wire through 3cm,what force will stretch it through 5cm and through what length will a force of 100N
14 answers
asked by
Pearl
3,584 views
A 4kg object is subjected to two forces, F1=2Ni-3Nj, and F2=4Ni-11Nj. The object is at rest at the origin at t=0.
What is the
6 answers
asked by
J
2,577 views
A cart rolls down a 2.5 m frictionless ramp in 1.25s after starting from rest at the top. What is the angle of the ramp?
4 answers
asked by
Carmen
603 views
What is the mass which causes a spring of k = 100 N/m to stretch by 10 cm?
5 answers
asked by
Robert
2,181 views
A satellite that is orbiting Earth at an altitude of 600 km. Use a mass of 5.98×1024 kg and a radius of 6.378×106 m for Earth.
4 answers
asked by
Tosin
1,177 views
What effort is exerted to lift a load of 150N with a machine having a velocity ratio of 3 and efficiency of 20%
4 answers
asked by
Ifedayo
1,409 views
two uniform cylinders have different masses and different rotational inertias.they simultaneously start from rest at top of an
4 answers
asked by
owen
4,155 views
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