12,725 Answered Questions for the topic physics

Physics

11/03/23

Pls help, sorry for the trouble

Link to image of the problemThank you!
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Physics

11/03/23

Find the force constant of the spring. Answer in units of N/m.
The force required to stretch a Hooke’s-law spring varies from 0 N to 43.2 N as we stretch the spring by moving one end 14.4 cm from its unstressed position. Find the force constant of the spring.... more
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Physics

11/03/23

What would his speed be? Answer in units of m/s.
A jogger (of mass 64 kg) has the same kinetic energy as that of the continent. What would his speed be? Answer in units of m/s.
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Physics

11/03/23

Probability and Statistics
n a statistics class there are 18 juniors and 10 seniors; 6 of the seniors are females and 12 of the juniors are males. if a student is selected at random, find the probability of selecting the... more
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Physics

11/03/23

Rotational Energy and Momentum

A spherical shell of mass M and radius R is released from rest and rolls without slipping down an inclined plane with a height of 3 m.I am very confused on how to solve this when I'm only given the... more
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Physics

11/02/23

Solve This Physics Problem
Three point masses (0.07 kg, 0.16 kg, and 0.115 kg) are placed at the corners of a right triangle of sides 6 cm and 7 cm. Find the center of mass of the three-mass system (in cm). (Assume that the... more
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Physics

11/02/23

Solve This Physics Problem
Two identical pucks collide elastically on an air hockey table. Puck 1 was originally at rest; puck 2 has an incoming speed of 4.74 m/s and scatters at an angle of 30° with respect to its incoming... more
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Physics

11/02/23

Magntiude and Momentum problem-please help explain problem to get to answer:)
A 0.14 kg baseball is dropped from rest from a height of 2.0 m above the ground. What is the magnitude of its momentum just before it hits the ground if we neglect air resistance?(answer: 0.88 kg... more
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Physics

11/02/23

IMPACT PROBLEM-Please help me understand the answer, I am lost:(
The parking brake on a 2000 kg Cadillac has failed, and it is rolling slowly, at 4 m/s, toward a group of children. Seeing the situation, you realize you have just enough time to drive your 1000... more
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Physics

11/02/23

Magnitude and Impulse on Person-please help explain, I am very confused.
Erica (22 kg) and Danny (33 kg) are bouncing on a trampoline. Just as Erica reaches the highest point of her bounce, Danny is moving upward past her, and at that instant grabs a hold of her. If... more
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Physics

11/02/23

RECOIL PHYSICS PROBLEM-please help explain how to get to the answer:)
A 2500-kg cannon suddenly fires a 35-kg cannonball at 280 m/s. What is the recoil speed of the cannon? Assume that frictional forces are negligible, and the cannon is fired horizontally. (answer:... more
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Physics

11/02/23

Change in momentum and moment of inertia physics problem-answers given-need help understanding!
A force of 50.5 N is applied tangentially to a wheel of radius 0.270 m and causes an angular acceleration of 2.20 rad/s^2. What is the moment of inertia of the wheel? (answer: 6.20 kgxm^2) A 350 N... more
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Physics

11/02/23

PHYSICS-PULLEY and ANGLE PROBLEM (have answers need help understanding)
A pulley has an initial angular speed of 2.50 rad/s and a constant angular acceleration of 1.40 rad/s^2. Through what angle does the pulley turn in 7.00 s? (answer: 51.8 rad)
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Physics

11/02/23

PHYSICS ROTATION PROBLEMS-I have answers just need help explaining
You are riding a Merry-go-round that rotates at 5.0 rpm. If your horse is located 4.0 m from the axis of rotation, how fast are you going in m/s? (answer: 2.1 m/s) A chicken is running in a... more
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Physics

11/01/23

I Don't Know How to Solve This Physics Problem
A bullet is fired at and passes through a piece of target paper suspended by a massless string. The bullet has a mass m, a speed v before the collision with the target, and a speed (0.536)v after... more
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Physics

11/01/23

I Don't Know How to Solve This Physics Problem
A cannon elevated at some angle 𝜃 (unknown) fires a shell with some initial speed v0 (unknown) that has a range R when fired over level ground. During a test fire, a shell explodes at the top of... more
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Physics

11/01/23

Solve This Physics Problem
A ball of mass 197 g is thrown with an initial velocity of 25 m/s at an angle of 30° with the horizontal direction. Ignore air resistance. What is the momentum of the ball after 0.5 s? (Do this... more
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Physics

10/31/23

A mass of 0.4 kg hangs motionless from a vertical spring whose length is 0.93m
A mass of 0.4 kg hangs motionless from a vertical spring whose length is 0.93m and whose unstreched length is 0.53m. Next the mass is pulled own to where the spring has a length of 1.05m given an... more
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Physics

10/30/23

Hydraulic wheel cylinder

In an automotive brake wheel cylinder with a diameter of 1" and a center fill port with a piston on each end, and a line pressure of 100 psi, do the pistons force total 200 lbs of force or is it... more
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Physics

10/30/23

Waves & Energy│Please Help!
A wave on a small lake has an amplitude of 0.1 meters. What happens to the energy of the wave by doubling its height to 0.2 meters? The energy of the wave remains the same. The energy of the wave... more
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Physics

10/30/23

Waves & Energy│Please Help!
Assume an average wave has an amplitude of 1 meter. Rogue waves are a rare occurrence in which the amplitude of the wave can reach as high as 15 meters.If the 1 meter average wave has an energy of... more
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Physics

10/30/23

Change in Kenetic Energy

A mover pushes a 260 kg piano on wheels up a ramp 7 meters long onto a stage 1.75 meters above the ground. The mover pushes the piano with a force of 680 N and the coefficient of friction is... more
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Physics

10/30/23

Three parts to this problem. Questions for both parts and additional info listed in "Description" below.
A pair of fuzzy dice is attached to the rearview mirror of a car with a short string. When the car accelerates forward, the string makes an angle of 7.17 degrees from the vertical.Part a) Sketch a... more
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Physics

10/30/23

Momentum Hockey Puck Problem
A 0.99 kg hockey puck is sliding along toward the defender at 5.05 m/s. The defender hits it back in the direction it came from, stick imparting a force of -132.9 N for 0.057 s. What is the final... more
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Physics

10/29/23

This problem has four parts. I will list the question to each part and additional info in "Description" below.
A block of mass m = 150 kg rests against a spring with a spring constant of k = 830 N/m on an inclined plane which makes an angle of θ degrees with the horizontal. Assume the spring has been... more
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