Recent questions in Physics

Force, Motion and EnergyAnswered question

Lexi Holmes 2023-04-01

Three identical blocks connected by ideal strings are being pulled along a horizontal frictionless surface by a horizontal force $\overrightarrow{F}$ The magnitude of the tension in the string between blocks B and C is T=3.00N. Each block has mass m=0.400kg.

What is the magnitude F of the force?

What is the tension in the string between block A and block B??

Force, Motion and EnergyAnswered question

Rowan Bray 2023-03-31

We have: A golf ball of mass 0.045 kg is hit off the tee at a speed of 45 m/s. The golf club was in contact with the ball for $5.0\times {10}^{-3}$ s. Find (a) the impulse imparted to the golf ball,and (b) the average force exerted on the ball by the golf club

???Force, Motion and EnergyAnswered question

Jaquan Ramsey 2023-03-30

A box is sliding with a speed of 4.50 m/s on a horizontal surface when, at point P, it encounters a rough section. On the rough section, the coefficient of friction is not constant but starts at .100 at P and increases linerly with distance past P, reaching a value of .600 at 12.5 m past point P. (a) Use the work energy theorem to find how far this box slides before stopping. (b) What is the coefficient of friction at the stopping point? (c) How far would the box have slid iff the friciton coefficient didn't increase, but instead had the constant value of .1?

?Force, Motion and EnergyAnswered question

ballar9bod 2023-03-30

The spring in the figure (a) is compressed by length delta x . It launches the block across a frictionless surface with speed v0. The two springs in the figure (b) are identical to the spring of the figure (a). They are compressed by the same length delta x and used to launch the same block. What is the block's speed now?

Force, Motion and EnergyAnswered question

Hector Arias 2023-03-30

A spring gun's spring has a constant force k =400 N/m and negligible mass. The spring is compressed 6.00 cm and a ball with mass 0.0300 kg is placed in the horizontal barrel against the compressed spring.The ball is then launched out of the gun's barrel after the spring is released. The barrel is 6.00 cm long, so the ball leaves the barrel at the same point that it loses contact with the spring. The gun is held so the barrel is horizontal. Calculate the speed with which the ballleaves the barrel if you can ignore friction. Calculate the speed of the ball as it leavesthe barrel if a constant resisting force of 6.00 Nacts on the ball as it moves along the barrel. For the situation in part (b), at what position along the barrel does the ball have the greatest speed?

?Force, Motion and EnergyAnswered question

Beckett Aguirre 2023-03-30

A small rock with mass 0.12 kg is fastened to a massless string with length 0.80 m to form a pendulum. The pendulum is swinging so as to make a maximum angle of 45 with the vertical. Air Resistance is negligible.

a) What is the speed of the rock when the string passesthrough the vertical position?

b) What is the tension in the string when it makes an angle of 45 with the vertical?

c) What is the tension in the string as it passes through the vertical?

Wave motionAnswered question

miljanwpd2 2023-03-26

A person is sitting $200m$ away from a $20hertz$ sound source. What is the time interval at which successive compressions pulses from the source reach him?

ElectromagnetismAnswered question

muldie64bp 2023-03-26

The magnetic field inside a long straight solenoid carrying current

A)is zero

B)increases along its radius

C)increases as we move towards its ends

D)is the same at all points

A)is zero

B)increases along its radius

C)increases as we move towards its ends

D)is the same at all points

Electric currentAnswered question

Taniya Erickson 2023-03-26

Materials which do not allow electric current to flow through them is known as

Force, Motion and EnergyAnswered question

Joslyn Landry 2023-03-25

Calculate the actual mechanical advantage of a lever.

Force, Motion and EnergyAnswered question

Kelton Rogers 2023-03-25

Read each statement below carefully and state, with reasons, if it is true or false : (a) The net acceleration of a particle in circular motion is always along the radius of the circle towards the centre (b) The velocity vector of a particle at a point is always along the tangent to the path of the particle at that point (c) The acceleration vector of a particle in uniform circular motion averaged over one cycle is a null vector

Wave motionAnswered question

se2ng0uhp 2023-03-25

Sound waves with frequency smaller than 20 Hz are called:

ultrasound

infrasound

nanosound

minisound

ultrasound

infrasound

nanosound

minisound

Force, Motion and EnergyAnswered question

postkortidvi 2023-03-25

The electric field 10 cm from a long wire is 2.4 kN/C. If wire carries uniform charge, what will be the field strength at 40 cm from the wire?

$A)0.6\text{}kN/C;\phantom{\rule{0ex}{0ex}}B)150\text{}N/C;\phantom{\rule{0ex}{0ex}}C)75\text{}N/C;\phantom{\rule{0ex}{0ex}}D)4.8\text{}kN/C$

$A)0.6\text{}kN/C;\phantom{\rule{0ex}{0ex}}B)150\text{}N/C;\phantom{\rule{0ex}{0ex}}C)75\text{}N/C;\phantom{\rule{0ex}{0ex}}D)4.8\text{}kN/C$

ElectromagnetismAnswered question

Zachariah Ferrell 2023-03-25

Which of the following units is used to express frequency?

Hertz

Watt

Newton

Pascal

Hertz

Watt

Newton

Pascal

Force, Motion and EnergyAnswered question

Rowan Bray 2023-03-25

The change in internal energy of a system that has absorbed 2 kcal of heat and does 500 J of work is

A) 6400J

B) 5400J

C) 7860J

D) 8900J

A) 6400J

B) 5400J

C) 7860J

D) 8900J

Force, Motion and EnergyAnswered question

muldie64bp 2023-03-24

What does negative $\mathrm{\u25b3}G$ mean?

Wave motionAnswered question

Aydan Hardy 2023-03-24

What type of wave travels slower through gases than it does through solids?

Thermal PhysicsAnswered question

Martha Richmond 2023-03-24

What is the work for the free expansion of a gas into vacuum?

Force, Motion and EnergyAnswered question

Reid Berger 2023-03-24

Two paths lead to the top of a hill. One is shorter and steeper and the second one is longer but less steep. For which of the two paths is the gain in potential energy more?

A) Path I

B) Path II

C) Same for both the paths

D) Data insufficient

A) Path I

B) Path II

C) Same for both the paths

D) Data insufficient

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