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kassy
Questions and answers by visitors named
kassy
Questions (47)
A student uses a 2.00-m-long steel string with a diameter of 0.90 mm for a standing wave experiment. The tension on the string
1 answer
797 views
A 0.110 kg baseball,traveling at 37.0 m/s, strikes the catchers mitt, which recoils 13.0cm in bringing the ball to rest. What
2 answers
534 views
What is the acceleration (in meters/second^2) of free falling 74kg sky diver, if the air resistance exerts a force of 233n?
1 answer
473 views
A flatbed truck is carrying a 2610kg crate of heavy machinery. if the coefficient of static friction between the crate and the
1 answer
607 views
A 2.0 kg object moving with a constant velocity of 5.0 m/s, is acted upon by a force of 14n in the direction of the motion for
1 answer
424 views
how large a fore (in newtons) is needed to accelerate a 5 metric-ton vehicle from rest to a speed of 10 km/hr in 4 s?
2 answers
479 views
a wooden box weighing 286N is pushed across the floor by a workman who exerts a horizontal force of 143N. If the force of
2 answers
587 views
Tarzan plans to cross a gorge by swinging in an arc from a hanging vine. If his arms are capable of exerting a force of 1170 N
4 answers
7,038 views
What is the maximum speed (in meters/second) with which a 1400 kg car can round a turn of radius 300 m on a flat road, if the
1 answer
421 views
How far (in meters) above the earth's surface will the acceleration of gravity be 34.0 % of what it is on the surface?
1 answer
389 views
A ball on the end of a string is revolving at a uniform rate in a vertical circle of radius 92.5 cm. If its speed is 4.50 m/s,
1 answer
827 views
Find the force of gravity (in newtons) on a spacecraft 15100 km above the earth's surface, if its mass is 400 kg
1 answer
489 views
Calculate the effective value of g, the acceleration of gravity (in meters/second^2), at 8600 km above the earth's surface.
2 answers
585 views
a golf club strikes a 0.045kg golf ball in order to launch it from the tee. For simplicity,assume that the average net force
1 answer
783 views
a block sits on a frictionless inclined plane, attached to another block over a frictionless pulley. the angle of the incline is
2 answers
570 views
a block slides down a frictionless ramp. at the bottom of the ramp is a vertical circular loop with a radius of 75 cm. from what
2 answers
549 views
To create artificial gravity, the space station is rotating at a rate of 1.00 rpm.the radii of the cylindrically shaped chambers
1 answer
681 views
the paris gun of world war I was a super gun capable of firing a 234lb shell about 81 miles away. these shells are also the
2 answers
524 views
A spring whose spring constant is 450 N/m is compressed 0.800 m. What speed (in meters/second) can it give to a 0.500 kg ball
3 answers
895 views
What is the minimum work in joules needed to push a 1210 kg car 54.0 m up a 12.5 degree incline? (Ignore friction.)
1 answer
400 views
A 550 N crate rests on the floor. How much work in joules is required to move it at constant speed 7.0 m along the floor,
4 answers
1,380 views
A 63 kg child descends a slide 7.6 m high and reaches the bottom with a speed of 3.20 m/s. How much thermal energy (in joules)
3 answers
2,361 views
A 1120 kg car rolling on a horizontal surface has a speed of 60 km/hr when it strikes a horizontal coiled spring and is brought
1 answer
426 views
A spring has a spring constant "k" of 460 N/m. How much must this spring be compressed (in meters) to store 60 J of energy?
2 answers
583 views
An object slides down a frictionless 33 degree incline whose vertical height is 37.0 cm. How fast is it going in meters/second
1 answer
703 views
Two railroad cars, each of mass 1800 kg and traveling 70.0 km/hr, collide head-on and come to rest. How much thermal energy in
1 answer
467 views
A 46 g bullet strikes and becomes embedded in a 1.27 kg block of wood placed on a horizontal surface just in front of the gun.
2 answers
488 views
An atomic nucleus at rest decays radioactively into an alpha particle and a nucleus smaller than the original. What will be the
2 answers
716 views
A MAN HOLDS A 178 N BALL IN HIS HAND, WITH THE FOREARM HORIZONTAL. HE CAN SUPPORT HE BALL IN THIS POSITION BECAUSE OF THE FLEXOR
1 answer
1,109 views
AN AUTOMOBILE TIRE HAS A RADIUS OF 0.330M AND ITS CENTER MOVES FORWARD WITH A LINEAR SPEED OF V= 15.0M/S. a) DETERMINE THE
4 answers
2,348 views
A PERSON LOWERS A BUCKET INTO A WELL BY TURNING THE HAND CRANK. THE CRANK HANDLE MOVES WITH A CONSTANT TANGENTIAL SPEED OF
2 answers
794 views
A 15 M LENGTH OF HOSE IS WOUND AROUND A REEL WHICH IS INITIALLY AT REST. THE MOMENT OF INERTIA OF THE REEL OF 0.44KGM^2 AND ITS
1 answer
815 views
When a 85.0 kg. person climbs into an 1800 kg. car, the car's springs compress vertically 1.8 cm. What will be the frequency of
1 answer
721 views
A fisherman's scale stretches 2.3 cm. when a 2.1 kg. fish hangs from it. What will be the frequency of vibration if the fish is
1 answer
626 views
A pendulum makes 27 vibrations in 36 s. What is its period in seconds?
1 answer
462 views
What is the period (in seconds) of a simple pendulum 62.0 cm. long, on the earth?
1 answer
409 views
a 7.0kg block and a 12kg block sit on a frictionless table. Between and touching, but not attached to, the blocks is a spring
3 answers
492 views
a sound generator is set up 5 m above the diving end of a swimming pool. the depth of the pool is known to be 12 m deep. the
1 answer
719 views
A uniform beam weighing 1300N is attached to a vertical wall so that it is perfectly horizontal. the beam is 8 m long. A support
1 answer
720 views
A rope of mass 0.73 kg is stretched between two supports 31 m apart. If the tension in the rope is 1100.0 N, how long (in
2 answers
517 views
A guitar string is 97 cm long and has a mass of 3.6 g. The length L from the bridge to the support post is 61 cm, and the string
2 answers
503 views
A hiker determines the length of a lake by listening for the echo of her shout reflected by a cliff at the far end of the lake.
4 answers
1,136 views
The string on a violin has a fundamental frequency of 150.0 Hz. The length of the vibrating portion is 36 cm and has a mass of
1 answer
484 views
An organ pipe is 81 cm long and at a temperature of 20 degrees C. What is the fundamental (in Hertz) if the pipe is closed at
1 answer
686 views
At T= 20 degrees C, how long (in meters) must an open organ pipe be if it is to have a fundamental frequency of 240.0 Hz?
1 answer
474 views
A tuning fork is set into vibration above a vertical open tube filled with water. The water level is allowed to drop slowly. As
2 answers
793 views
How fast (in meters/second) is an object moving on the earth, if its speed is specified as Mach 0.2 ?
1 answer
372 views
Answers (5)
The string on a violin has a fundamental frequency of 150.0 Hz. The length of the vibrating portion is 36 cm and has a mass of 0.51 g. Under what tension (in newtons) must the string be placed?
So I got a little confused. I got stuck on this equation at: 1/2kx^2=1/2 m1* (m2/m1*v^2)+1/2 m2v2^2 Then: kx^2=m2*v2+1/2(m2v2^2) Then what?
A 550 N crate rests on the floor. How much work in joules is required to move it at constant speed 7.0 m along the floor, against a friction force of 150 N?
Was it D ?
Whats The Answer ?
