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Energy and Motion
Page 3
Questions (181)
When a driver brakes an automobile, friction between the brake disks and the brake pads converts part of the car's translational
1 answer
asked by
Jackson
959 views
From a tree that is 15m tall, a fruit of mass 2kg falls to the ground. (a) find the initial GPE (b) find the speed at impact (c)
1 answer
asked by
Madi
905 views
A skier (m=61.0 kg) starts sliding down from the top of a ski jump with negligible friction and takes off horizontally. If h =
1 answer
asked by
Anon
884 views
a 2646lb car is moving on the freeway at 69 mph.
(a) Find the magnitude of its momentum and its kinetic energy in SI units. (b)
10 answers
asked by
chyenne
871 views
A hoop starts from rest at a height 3.0 m above the base of an inclined plane and rolls down under the influence of gravity.
2 answers
asked by
Anonymous
835 views
A 250.0 kg roller coaster car has 20,000 J of potential energy at the top of the hill. Neglecting frictional losses, what is the
2 answers
asked by
Tyra J
821 views
A pendulum is made with a bowling ball as the bob and a wire attached to the ceiling, as shown in the illustration below. The
4 answers
asked by
Susie
1,221 views
When pushing a child on a swing, you must give them a push periodically to keep them moving. This seems to go against the law of
1 answer
asked anonymously
45 views
In the high jump, the kinetic energy of an athlete is transformed into gravitational potential energy without the aid of a pole.
1 answer
asked by
Matt
802 views
Under conditions of conservation of energy where the initial energy object is only gravitiational potential energy and the final
2 answers
asked by
yah
785 views
I've tried a bunch, have no idea. Got the first part, no idea on the second one.
A basketball, of mass m = 0.45 kg is dropped,
2 answers
asked by
John
776 views
an elastic ball rebounces 70% when it is dropped from the height. if it is dropped from 60m what is the total distance travelled
2 answers
asked by
Anonymous
757 views
A superball is dropped from rest from a height of 2.0m. It bounces repeatedly from the floor, as superballs are prone to do.
1 answer
asked by
Chey
764 views
a 20kg block is connested to a 30kg block by a string that passes over a frictionless pully. the 30kg block is connected to a
2 answers
asked by
sello
765 views
The spring of a spring gun is compressed a distance d of 3.2 cm from its relaxed state, and a ball of mass m = 12g is put in the
2 answers
asked by
Anna
748 views
A ball bounces back .06 of its height on every bounce. If a ballistic dropped from 200feet, how high does it bounce on the fifth
3 answers
asked by
m
727 views
A small block of mass m = 225 g is released from rest at point circled A along the horizontal diameter on the inside of a
1 answer
asked by
steve
720 views
The body asends a slope with speed 10m/s.If 105J of energy of body is lost doe to friction ;the height to which the body will
2 answers
asked by
Thousif
666 views
A student uses a spring with a spring constant of 130 N/m in his projectile apparatus. When 56 J of potential energy is required
1 answer
asked by
Lesley
640 views
divide both sides of the equation by mass, it divides out.
mass*HeatFusion=mass*gh How do you calculate the height that a block
1 answer
asked by
bobpursley
634 views
A ball is dropped from a height of 10 m. If the energy of the ball reduces by 40% after striking
the ground, how much high can
1 answer
asked by
Anonymous
639 views
If an electron has a total energy of 5.6 MeV, how would I find the kinetic energy and momentum??
2 answers
asked by
Sam
623 views
A block of wood with mass M = 0.440kg hangs at rest (Vi=0) from the ceiling by a string and a m = 0.0720kg elastic ball is
1 answer
asked by
Avinash
623 views
A little girl with a mass of 33 kg jumps on a trampoline that has an elastic constant of 2336 N/m. When she jumps onto the
1 answer
asked by
Anonymous
622 views
The spring of a spring gun is compressed a distance (d) of 3.2 cm from its relaxed state, and a ball of mass m = 12 g is put in
2 answers
asked by
Ryan
628 views
A 1400kg car starts at rest and rolls down a hill from a height of 12m. (a) how much kinetic energy does the car have at the
2 answers
asked by
kiki
621 views
Hi! Would one of you please check my work? Thanks! ( I used significant digits, by the way)
A student throws a 5.00 kg steel shot
7 answers
asked by
Lucina
604 views
Mass m2 rests on an incline and attaches to a string that goes over a pulley, where mass m1 hangs on the other side of the
1 answer
asked by
James
591 views
A vehicle expends an energy of 25000J while moving at a constant speed of 5 ms.what is the mass of vehicle?
3 answers
asked by
nitya
608 views
A ski slope drops at an angle of 24 degrees with respect to the horizontal and is 500 m long. A 60 kg skier skis down from the
2 answers
asked by
Iza
608 views
You drop a ball from a height of 2.8 m, and it bounces back to a height of 1.0 m. (Ignore air resistance.)
(a) What fraction of
2 answers
asked by
mike
600 views
A 250 kg rock falls off a cliff and comes to a rest on the ground, which is 40m below the cliff. At what point is the rock’s
4 answers
asked by
...
565 views
standing on the ground, you throw a 0.55 kg lunch bag at a friend, you manage to throw the bag straight up (vertically) using 50
2 answers
asked by
kathy
573 views
Just as a car tops a 51 meter high hill with a speed of 84 km/h it runs out of gas and coasts from there, without friction or
2 answers
asked by
18
547 views
A hockey puck has a mass of 210 g. If the hockey puck has 73 J of kinetic energy, what is its speed?
2 answers
asked by
Mileena
556 views
A ball is dropped from a height of 10 meter.If the energy of the ball reduces by 40% after striking the ground, how much high
2 answers
asked by
Reem
549 views
An object of mass 10kg is drawn from height of 10cm. Find (g=10m/s) its kinetic energy on reading the ground.. Velocity before
2 answers
asked by
pratheeksha
526 views
Highway safety engineers build soft barriers so that cars hitting them will slow down at a soft rate. A person wearing a safety
2 answers
asked by
sam
539 views
In an arcade game a 0.135 kg disk is shot
across a frictionless horizontal surface by compressing it against a spring and
1 answer
asked by
physics
549 views
During a free kick at a soccer playoff game a 0.5 kg ball at the peak of the kick 14.7 m above the field had a kinetic energy of
2 answers
asked by
Dan
510 views
A 3 m, 250 N/m spring is at the bottom of a 10 m, 20 degree frictionless slope with a 30 m drop off the top of the incline. If a
2 answers
asked by
Isaac
516 views
On a hot summer day, you've got nothing better to do than play with ice cubes. You are currently sliding a 75 gram Ice Cube up
2 answers
asked by
Anonymous
504 views
A massless spring of constant k =60.9 N/m is fixed on the left side of a level track. A block of mass m = 0.7 kg is pressed
2 answers
asked by
Anonymous
509 views
Does work transfer energy as the result of motion
2 answers
asked by
laura
480 views
a toy car rolls horizontally on to a ramp that has a total height of 0.8m. what minimum velocity will allow the car to reach the
2 answers
asked by
Jacob
491 views
A girl of 50 kg slides down a 8 m long slide into a pool. The upper end of the slide is 4.0 m above the water and the lower end
1 answer
asked by
Alfred
500 views
A track consists of a frictionless incline plane, which is a height of 0.5m, and a rough horizontal section with a coefficient
1 answer
asked by
Gwladys
518 views
A ball mass 0.2kg is dropped from the height of 20m on the impact with ground lose 30j of energy calculate the height it reachon
2 answers
asked by
Omari
492 views
Water is pumped from a stone basin up through a pipe 1 meter high. At that height, the water flows out through a tap and falls
1 answer
asked by
Macie
475 views
A girl with a mass of 83 kg is climbing in a tree 20 m above the ground. If she lands on a trampoline with a constant of 312
2 answers
asked by
Marina
470 views
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Parent Categories (9)
Classical mechanics
Kinematics
Kinetic Energy
Kinetics
Mechanics
Mechanisms
Physical Science
Physics
Science and Physics