12,726 Answered Questions for the topic physics

Physics

09/27/22

On dry concrete, a car can decelerate at 6.0m/s2, whereas on wet concrete it can decelerate at only 5.0m/s2.

(a) Find the distance necessary to stop a car moving at 24.0m/s24.0m/s on dry concrete.=(b) Find the distance necessary to stop a car moving at 24.0m/s24.0m/s on wet concrete.=(c) Repeat both... more
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Physics

09/27/22

Dragsters can achieve average accelerations of 25.0m/s2. Suppose such a dragster accelerates from rest at this rate for 5.36s. How far does the dragster travel in this time?
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Physics

09/26/22

Kinematic equations #3
A skydiving raccoon jumps off a cliff and falls for 8 seconds before he opens his parachute. Whatwas his speed just before he opened the parachute?
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Physics

09/26/22

Can anyone help me with this question?
1) A vector A has a magnitude of 9 and is directed along an angle [theta= 30 degrees].  w.r.t the x-axis. its x component is............... , and y component is................. . Round up to two... more
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Physics

09/25/22

Please help me with this question!!
If vector C= vector a+ vector b and vector A= xi+6j, vector B=2i-3j, vector C=4j+yj, values of x and y? (i hat and j hat)
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Physics

09/25/22

Time until an object reaches the bottom of a lake.
On a beautiful day you decide to go fishing with your younger brother Ben. Ben has not been fishing before so he doesn't know how to properly cast out his line. He puts the lure 29.7 cm above the... more
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Physics

09/25/22

What is the brain's acceleration, and the "g-force" (the unitless number of 𝑔g's of acceleration, where 𝑔g is given on the formula sheet) of the woodpecker's brain?
This question is a continuation from the previous question.A woodpecker's brain is specially protected from large decelerations by tendon-like attachments inside the skull. While pecking on a tree,... more
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Physics

09/25/22

What is the stopping time of the skull?
A woodpecker's brain is specially protected from large decelerations by tendon-like attachments inside the skull. While pecking on a tree, the woodpecker's skull comes to a stop from an initial... more
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Physics

09/24/22

max height of object above the surface
SpaceX plans to transport humans to Mars, but experienced a few rocket failures while on initial tests. So suppose the rocket to Mars (without people on board - another test flight) liftoffs from... more
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Physics

09/24/22

Find where one object surpasses another.
You are standing on top of a 219 m tall building. A drone operated by your friend is headed straight down, at a speed of 28.0 m/s. Just as the drone passes you, you release a tennis ball off the... more
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09/24/22

Help needed with physics problem
A 2.5-cm-diameter parallel-plate capacitor has a 2.1 mm spacing. The electric field strength inside the capacitor is 1.0×10^5 V/m .How much charge is on each plate?My answers were: 6.0*10^-8... more
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Physics

09/24/22

A Vector P of magnitude 3.0 N acts towards the right and a vector Q of magnitude 4.0 N acts upwards. What is the magnitude and direction of the vector (P - Q)?
Please show your process.
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Physics

09/22/22

AP Physics Question
A boy throws a stone straight upward with an initial speed of 15 m/s. What maximum height will the stone reach before falling back down?
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Physics

09/22/22

Physics vector question
Add the following four vectors together using the computer method. Don't forget to include magnitude, units, and direction on your final answer.Vector A: 6 m, 30 degrees ... more
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Physics

09/22/22

Two boxes on inclined plane fastened to wall
Two blocks are connected by a massless string and are held in position by another massless string along a frictionless incline (as shown in the figure). Let M1 = 4.30 kg, M2 = 2.70 kg, and θθ =... more
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Physics

09/21/22

please help me with this physics question
A stunt woman of mass 50.0 kg can run at a top speed of 19.2 mph. A film requires that she run and jump off a cliff that sits 13.3 m above the surface of a lake. However, she must clear a shelf of... more
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Physics

09/20/22

Physics Question
The velocity of the transverse waves produced by an earthquake is 4.35 km/s, while that of the longitudinal waves is 4.13 km/s. A seismograph records the arrival of the transverse waves 64.72 s... more
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Physics

09/20/22

AP Physics: A sports car moving at constant velocity travels 120 m in 5.0 s. It then brakes and comes to a stop in 4.0 s. Questions in description
a. How fast is the far moving during the first 5 s?b. What is the magnitude of the acceleration of the car as it brakes and comes to a stop?
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09/20/22

Refraction in a prism
I'm having problems with this optics problem:Glass prism ABC with refractive index n1 = 1.6, vertex A angle α = 40° and vertex B angle β = 60°,placed in a container with two different liquids... more
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09/20/22

Kirchoff's laws and electrical circuit
Two batteries with emf ε1 = 10 V and emf ε2 = 20 V and internal resistances r1 = 1 Ω and r2 = 2 Ω, respectively, are connected in parallel, and then connected in parallel to a resistor of R = 30 Ω... more
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09/20/22

Melting ice cubes
Two identical ice cubes are placed in two large containers, one containing tap water and the other containing a strong saline solution. Both liquids are of equal volume and at the same room... more
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Physics

09/19/22

If jack was traveling at 100 miles in 2 hours what was his speed in miles per minute

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Physics

09/19/22

A Box with Friction
A rope is pulling horizontally to the right on a box of weight 32.0 N which is sliding across the floor at a constant speed. The coefficient of kinetic friction between the floor and the box is... more
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Physics

09/19/22

Nick travels 2.50km north followed by 4.30km south and then 1.40km north
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09/19/22

Weight and Mass Conversion with Constant Acceleration
Hello, I'm having some issues with these homework questions and would appreciate a walkthrough of what kind of equation I'm supposed to use. Thank you in advance!"An astronaut weighs 658 N on... more
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