yoyiluis05

A mass on a spring vibrates in simple harmonic motion at afrequency of 4.0 Hz and an amplitude of 4.0 cm. If a timer isstarted when its displacement is a maximum (hence x = 4 cm when t =0),

What is the speed of the mass when t = 3 s?

What is the acceleration magnitude at t = 3s?

An object on a spring vibrates in a simple harmonic motion with afrequency of 1.0 Hz and an amplitude of 5.00 cm. If a timer isstarted when the mass is in the equilibrium position, what is theobject's distance from its equilibrium position at t=2.25 s?
A) 7.50 cm B) 5.00 cm C) 2.50 cm D)1.25 cm E)zero

i dont remember anywhere in this chapter giving an equation withtime and distance so im stuck on what equation to use to figurethis out. Help please and thank you

A mass on a spring vibrates in simple harmonic motion at a frequency of 4.0 Hz and an amplitude of 4.0 cm. If a timer is started when its displacement is a maximum (hence x = 4 cm when t = 0), what is the speed of the mass when t = 3 s?

A mass on a spring vibrates in simple harmonic motion at a frequency of 4.0 Hz and has amplitude of 8.0 cm. If the mass of the object is 0.20 kg, what is the spring constant?

A 0.600-kg object attached to a spring with a force constant of8.00 N/m vibrates in simple harmonic motion with an amplitude of10.6 cm.

(e) Calculate the time interval required for the object to movefrom x = 0 to x = 4.60 cm

Which of the two figures are congruent? Explain your answer.

A. Figure A and Figure B.

B. Figure B and Figure C.

C. Figure A and Figure C.

D. None of the figures are congruent to each other.

A 2.0-m m-long string vibrates at its second-harmonic frequencywith a maximum amplitude of 1.2 cm. One end of the string is at x=0 cm.
Find the oscillation amplitude at x =10 cm.

A parallel plate capacitor consists of two parallel plates filled with Teflon (dielectric constant of 2.1). If the separation between the plates is 1.2 mm and each plate is a perfect square with 1.4 cm sides what is the capacitance of this capacitor?

What is the Y-intercept of the line below?

A. -1/2

B. -3/4

C. -2/3

D. -1

The approximate linear equation of the graph below is y = 4 x + 55.  Which interpretation of the y-intercept is correct?

A. A student can receive a 55% for studying for 4 hours.

B. A student can receive a 55% without studying.

Susan's 10 kg baby brother Paul sits on a mat. Susan pulls the mat across the floor using a rope that is angled 30° above the floor. The tension is a constant 34 N and the coefficient of friction is 0.20. Use work and energy to find Paul's speed after being pulled 2.4 m.

A block of mass, m=5.0 kg is pulled along a rough horizontal surface by a rope. The tension in the rope is 40 N, and the coefficient of kinetic friction between the block and the surface is, .25. If the block travels a distance of 4.5 m along the surface, what is the work done by the rope? Also what is the work done by friction on the block? Any help is great.

A sledge loaded with bricks has a total mass of 18.9 kg and is pulled at constant speed by a rope inclined at 20.1° above the horizontal. The sledge moves a distance of 19.4m on a horizontal surface. The coefficient of kinetic friction betweenthe sledge and surface is 0.500.(a) What is the tension in the rope?(b) How much work is done by the rope on the sledge?(c) What is the mechanical energy lost due to friction?I'm having trouble with part C. I used the fs=.5*sin20.1*19.4 for the friction force, but that's not correct...

A 5kg box sits on a table with friction. It is pulled by a rope that makes a 450 angle above the table. The tension on the rope is 30 N. It accelerates at 2 m/s2 for 5 s. What is the normal force at the box, friction force at the base, the coefficient of friction, the work done by the tension, and the energy converted to heat by the friction?

There is a 5kg box on friction ground with 0.2 friction coefficient. What is the energy requird to move the box for 20 m?