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A fisherman's scale stretches 3.8 cm when a 3.3 kg fish hangs from it. (a) What is the spring stiffness consta?
A fisherman's scale stretches 3.8 cm when a 3.3 kg fish hangs from it.
(a) What is the spring stiffness constant?
N/m
(b) What will be the amplitude and frequency of vibration if the fish is pulled down 2.1 cm more and released so that it vibrates up and down?
amplitude cm
frequency Hz
1 AnswerPhysics9 years agoA 0.48 kg mass at the end of a spring vibrates 5.0 times per second with an amplitude of 0.10 m. (a) Determine?
A 0.48 kg mass at the end of a spring vibrates 5.0 times per second with an amplitude of 0.10 m.
(a) Determine the velocity when it passes the equilibrium point.
m/s
(b) Determine the velocity when it is 0.10 m from equilibrium.
m/s
(c) Determine the total energy of the system.
J
(d) Complete the equation describing the motion of the mass, assuming that x was a maximum at t = 0.
m cos[ ( rad/s )t ]
2 AnswersPhysics9 years agoA 0.258-kg volleyball approaches a player horizontally with a speed of 12.5 m/s. The player strikes the ball w?
A 0.258-kg volleyball approaches a player horizontally with a speed of 12.5 m/s. The player strikes the ball with her fist and causes the ball to move in the opposite direction with a speed of 22.0 m/s.
(a) What impulse is delivered to the ball by the player?
kg·m/s
(b) If the player's fist is in contact with the ball for 0.0600 s, find the magnitude of the average force exerted on the player's fist.
N
1 AnswerPhysics9 years agoPhysics problem help!!!?
A 21.0-kg child on a 3.00-m-long swing is released from rest when the ropes of the swing make an angle of 35.0?
A 21.0-kg child on a 3.00-m-long swing is released from rest when the ropes of the swing make an angle of 35.0° with the vertical.
(a) Neglecting friction, find the child's speed at the lowest position.
(b) If the actual speed of the child at the lowest position is 2.90 m/s, what is the mechanical energy lost due to friction?
1 AnswerPhysics9 years agoPLEASE HELP! Physics kinetic coefficient of friction?
How to Find Kinetic coefficient of friction?
I need help with parts B and C please! I can't figure out how to calculate the kinetic coefficient!!
A 3.00-kg block starts from rest at the top of a 33.5° incline and slides 2.00 m down the incline in 1.30 s.
(a) Find the acceleration of the block.
2.366 m/s2
(b) Find the coefficient of kinetic friction between the block and the incline.
(c) Find the frictional force acting on the block.
N
(d) Find the speed of the block after it has slid 2.00 m.
3.07 m/s
1 AnswerPhysics9 years agoA student decides to move a box of books into her dormitory room by pulling on a rope attached to the box. She?
A student decides to move a box of books into her dormitory room by pulling on a rope attached to the box. She pulls with a force of 130 N at an angle of 30.0° above the horizontal. The box has a mass of 24.0 kg, and the coefficient of kinetic friction between box and floor is 0.300.
(a) Find the acceleration of the box.
1 AnswerPhysics9 years agoA crate of mass m = 23 kg rides on the bed of a truck attached by a cord to the back of the cab as in the figu?
A crate of mass m = 23 kg rides on the bed of a truck attached by a cord to the back of the cab as in the figure. The cord can withstand a maximum tension of 61 N before breaking. Neglecting friction between the crate and truck bed, find the maximum acceleration the truck can have before the cord breaks.
? m/s^2
1 AnswerPhysics9 years agoObjects with masses m1 = 14.0 kg and m2 = 6.0 kg are connected by a light string that passes over a frictionle?
Objects with masses m1 = 14.0 kg and m2 = 6.0 kg are connected by a light string that passes over a frictionless pulley as in the figure below. If, when the system starts from rest, m2 falls 1.00 m in 1.61 s, determine the coefficient of kinetic friction between m1 and the table.
http://www.webassign.net/sercp9/4-p-045a-mi.gif
Can someone help me figure out how to do this? thanks!!
2 AnswersPhysics9 years agoA 1,480-N crate is being pushed across a level floor at a constant speed by a force of 200 N at an angle of 20?
A 1,480-N crate is being pushed across a level floor at a constant speed by a force of 200 N at an angle of 20.0° below the horizontal, as shown in the figure (a) below.
http://www.webassign.net/sercp9/4-p-041.gif
(a) What is the coefficient of kinetic friction between the crate and the floor?
μk =
(b) If the 200-N force is instead pulling the block at an angle of 20.0° above the horizontal, as shown in the figure (b), what will be the acceleration of the crate? Assume that the coefficient of friction is the same as that found in part (a).
m/s2
Can someone help me figure out how to do this problem?? Thanks!
5 AnswersPhysics9 years agoTwo blocks each of mass m = 3.01 kg are fastened to the top of an elevator as in the figure. (a) If the eleva?
Two blocks each of mass m = 3.01 kg are fastened to the top of an elevator as in the figure.
http://www.webassign.net/sercp9/4-p-021.gif
T1= 68.6 N
T2= 34.31 N
(b) If the strings can withstand a maximum tension of 93.0 N, what maximum acceleration can the elevator have before the upper string breaks?
m/s2
Can someone help me figure out how to calculate this? Thank you!
1 AnswerPhysics9 years agoA 1,480-N crate is being pushed across a level floor at a constant speed by a force of 200 N at an angle of 2?
A 1,480-N crate is being pushed across a level floor at a constant speed by a force of 200 N at an angle of 20.0° below the horizontal, as shown in the figure (a) below.
http://www.webassign.net/sercp9/4-p-041.gif
(a) What is the coefficient of kinetic friction between the crate and the floor?
μk =
(b) If the 200-N force is instead pulling the block at an angle of 20.0° above the horizontal, as shown in the figure (b), what will be the acceleration of the crate? Assume that the coefficient of friction is the same as that found in part (a).
m/s2
Can someone help me figure out how to do this problem?? Thanks!
1 AnswerPhysics9 years agoObjects with masses m1 = 14.0 kg and m2 = 6.0 kg are connected by a light string that passes over a frictionle?
Objects with masses m1 = 14.0 kg and m2 = 6.0 kg are connected by a light string that passes over a frictionless pulley as in the figure below. If, when the system starts from rest, m2 falls 1.00 m in 1.61 s, determine the coefficient of kinetic friction between m1 and the table.
http://www.webassign.net/sercp9/4-p-045a-mi.gif
Can someone help me figure out how to do this? thanks!!
2 AnswersPhysics9 years agoCan someone explain to me why we add electrons and H+ into redox reactions?
when doing redox reactions, we are doing half reactions then eliminating stuff to get the final answer.
Ex: C6H5CH2OH+ KMnO4 ---> (KOH above arrow) C6H5CO2K+MnO2
so for the first half reaction you get KOH+ C7H80 ---> C7H5O2K+ 4H+ +4E-
second half reaction: 3H+ + 3E- + KMnO4---> MnO2+KOH+H20
I know i'm over thinking this, but where do the electrons come from?!
Thanks!
1 AnswerChemistry9 years agoA freight train has a mass of 1.2 × 107 kg. If the locomotive can exert a constant pull of 6.6 × 105 N, how lo?
A freight train has a mass of 1.2 × 107 kg. If the locomotive can exert a constant pull of 6.6 × 105 N, how long does it take to increase the speed of the train from rest to 80 km/h?
3 AnswersPhysics9 years agoA 5.4-g bullet leaves the muzzle of a rifle with a speed of 302 m/s. What force (assumed constant) is exerted?
A 5.4-g bullet leaves the muzzle of a rifle with a speed of 302 m/s. What force (assumed constant) is exerted on the bullet while it is traveling down the 0.76-m-long barrel of the rifle?
2 AnswersPhysics9 years agoAfter falling from rest from a height of 27 m, a 0.55-kg ball rebounds upward, reaching a height of 17 m. If t?
After falling from rest from a height of 27 m, a 0.55-kg ball rebounds upward, reaching a height of 17 m. If the contact between ball and ground lasted 1.8 ms, what average force was exerted on the ball?
N
2 AnswersPhysics9 years agoA chemist allowed 10.0 g of Benzaldehyde to react with 10.0 g of zinc metal. She obtained 5.0 g of toluene. Wh?
What is her percent yield?
2 AnswersChemistry9 years agoOrganic Chemistry Help?
How much potassium benzoate can theoretically be prepared from 10.0 grams of benzyl alcohol and 15.0 grams of KMNO4?
If 10.0 grams of potassium benzoate is actually obtained from the experiment described in part one, what is the percent yield?
Can someone tell me how to calculate this? The equation for the rxn is
3C6H5CH2OH + 4 KNMO4 --> 3C6H5CO2K + 4H2O +KOH +4MNO2
1 AnswerChemistry9 years agoObjects in Equilibrium have:?
A) positive acceleration
B) zero acceleration
C) negative acceleration
D) zero velocity
2 AnswersPhysics9 years agoA car is parked on a cliff overlooking the ocean on an incline that makes an angle of 15.0° below the horizont?
A car is parked on a cliff overlooking the ocean on an incline that makes an angle of 15.0° below the horizontal. The negligent driver leaves the car in neutral, and the emergency brakes are defective. The car rolls from rest down the incline with a constant acceleration of 2.43 m/s2 for a distance of 65.0 m to the edge of the cliff, which is 45.0 m above the ocean.
(a) Find the car's position relative to the base of the cliff when the car lands in the ocean.
(b) Find the length of time the car is in the air.
1 AnswerPhysics9 years ago
