12,815 Answered Questions for the topic physics

Physics

04/26/22

The weight of a falling object the moment it hits the ground.

How do I measure the weight of a falling object the moment it hits the ground? For example, a 15kg ball is suspended 100 meters in the air and then dropped.
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Physics

04/26/22

Can we change Kinetic energy to electrical energy or any other energy according to our requirement?
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Physics

04/25/22

circular motion
A rotating platform of radius R = 1.5 cm starts from rest and accelerates with uniform angular acceleration α = 22 rad/s2.a) write an expression that gives the centripetal acceleration on the edge... more
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Physics

04/25/22

circular motion
The angular speed of a rotating platform changes from ω0 = 1.4 rad/s to ω = 8.2 rad/s at a constant rate as the platform moves through an angle Δθ = 8.5 radians. The platform has a radius... more
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Physics

04/25/22

circular motion
At its lowest setting a centrifuge rotates with an angular speed of ω1 = 350 rad/s. When it is switched to the next higher setting it takes t = 12.5 s to uniformly accelerate to its final angular... more
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Physics

04/25/22

circular motion
Suppose a piece of dust is stuck to a CD such that it does not slip even when the CD is spinning.a) if the constant spin rate of the CD is 460rpm, then what is the angular distance in radians, is... more
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Physics

04/25/22

circular motion
 A bicycle wheel has a radius r = 0.24 m and rotates at a constant frequency of f = 59 rev/min.a) calculate the period of rotation of the wheel in T secondsb) what is the tangential speed of a... more
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04/25/22

Electrostatistics (Physics)
Two point charges of -2.0 C are fixed at opposite ends of a meter stick. Where on the meter stick (if anywhere) could (a) a free electron and (b) a free proton are placed so that they are in... more
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Physics

04/25/22

Can Kinetic energy move from one place to another, like one part of a string to another?
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04/24/22

Linear velocity problem
The diameter of the back wheel of a tricycle is 1.5 times longer than the front wheel's diameter. When the tricycle is moving, the surface points of the back wheel move with the linear velocity of... more
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04/24/22

Kinematics: compare the velocities
The motion equations of two moving bodies are:x1=1+3tx2=t+2t2Compare the velocities during a) the end of first five seconds; b) the end of last five secondsThe correct answer for a) should be:... more
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04/24/22

The bus is going with an acceleration of 2 m/s^2. What is the time frame during which the velocity of the bus increases by 72 km/h
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Physics Math

04/23/22

(Help) How to solve this question with solution?
Sable, Labelle, and Mabel are sisters working on their tailor shop. The three sisters needed to push one box each with identical mass to prepare for their day of work. Sable finished the task... more
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Physics Math Calculus

04/22/22

An object moves along a coordinate line with velocity v(t) = t(6 − t) m/s. Its initial position is 2 units to the left of the origin.
(a) Find the position of the object 16 seconds later. (b) Find the total distance traveled by the object during the first 16 seconds.
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Physics

04/22/22

i really cant figure this out
A space probe is being prepared for a deep-space mission. The engineers have divided the trip into five segments based on the required changes in motion, as noted in the table. During which parts... more
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Physics

04/21/22

Gravitation force
1kg mass freely falling in downward direction from 100m height at south pole which mean gravity value is 9.863g/m2 what is velocity of mass when falling and hit no bouncing area and speed of mass... more
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Physics

04/20/22

To find parsec, why do we need to divide AU by (1/3600)× (pi/180)
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Physics

04/20/22

Rotational motion problems

A wheel turning 1.50 rad/sexperiences an angularacceleration of 0.322 rad/s^2.How many radians has it rotatedafter 4 80 s?Could someone please answer this throughly,it would be greatly appreciated!:)
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Physics

04/20/22

a 2.0 x 103 kg truck is driving down a hill at 105 km/hr when a dog runs out on the road 94m in front of it

A 2.0 x 103 kg truck is driving down the road at 105 km/hr when a dog runs out on the road 94m infront of it. The driver’s reaction time is 0.35 seconds before hitting the brakes. The coefficient... more
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04/20/22

Calculate the magnitude and direction of the resultant electric field at the origin due to these charges
A point charge 𝑞1 = +6.00 𝑥 10−9𝐶 is at the point 𝑥 = 0.800 𝑚, 𝑦 = 0.600 𝑚 and a second point charge 𝑞2 = −2.00 𝑥 10−9𝐶 is at the point 𝑥 = 0.800 𝑚, 𝑦 = 0 𝑚. Calculate the magnitude and direction... more
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Physics

04/19/22

How long will it take for the penny to hit the ground if the building is 1,101 feet tall?
You are standing on top of a building, and you drop a penny from the highest point.  How long will it take for the penny to hit the ground if the building is 1,101 feet tall?Remember that... more
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Physics

04/19/22

A skateboarder is rolling back and forth inside a “frictionless half pipe” that is part of a circle of radius 10m. His motion is driven by gravity. If he starts at 2 m away from the bottom of the…
A skateboarder is rolling back and forth inside a “frictionless half pipe” that is part of a circle of radius 10 m. His motion is driven by gravity. If he starts at 2 m away from the bottom of the... more
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Physics Math

04/19/22

(Help) How to solve this question with solution?
A force applied by the cue (stick) caused a 200g cue ball to speed up from rest to 7.8m/s in 3 seconds. What is the change in momentum of the cue ball? What is the impulse on the cue ball? How much... more
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Physics

04/19/22

A block of mass 2 kg hangs from a spring with constant 18 N/m. It is lifted up to a height y=20 cm and dropped from rest. a. What is the period of motion?
A block of mass 2 kg hangs from a spring with constant 18 N/m. It is lifted up to a height y = 20 cm and dropped from rest.a. What is the period of motion?b. After 1.2 seconds where will the block... more
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Physics

04/19/22

Rotation of Rigid bodies
A bicycle wheel with radius 0.3 m rotates from rest to 3 rev/s in 5 s. What is the magnitude and direction of the total acceleration vector at the edge of the wheel at 1.0 s?magnitude: direction:... more
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