12,727 Answered Questions for the topic physics

Physics Calculus

10/13/22

Work on an incline
   The diagram shows a crate with mass m=20.9kgm=20.9kg being pushed up an incline that makes an angle ϕ=24.7∘ϕ=24.7∘ with the horizontal. The pushing force is horizontal, with magnitude PP, and... more
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Physics

10/13/22

2D Kinematics Problem

Wile E. Coyote is in an Acme Rocket Sled traveling at a velocity of 100 m/s when he misses a turn and flies off a 46-meter high cliff. How fast does Wile crash into the ground. My question is how... more
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Physics

10/13/22

A person is traveling along a straight road. He moves at a steady 32 m/sec for 6.0 seconds, and then they slow down at a steady rate of 4.0 meters/sec^2 until they come to a stop. (question below)
Their speed was steady from time = 0 sec to time = 6 sec. What was their speed at time = 9 seconds?I set my equation up like this -4.0 m/s^2 = (v(final) - 32 m/s)/9 s and I got 4 m/s going backward... more
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Physics

10/13/22

Person A is at the top of a cliff. Person B is at the bottom of the cliff. Person B throws a ball straight up toward Person A. How much speed does it have when it gets to Person B? (more info below)
Person A is at the top of a cliff. Person B is at the bottom of the cliff. Person B throws a ball straight up toward Person A. It leaves her hand with speed = v, and 3.0 seconds later, the ball... more
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Physics

10/13/22

We want to find how much charge is on the electrons in a nickel coin. Follow this method. A nickel coin has a mass of about 4 g. Each mole (6.02 × 1023 atoms) has a mass of about 58 g
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Physics Math Astronomy

10/12/22

What mass would a worm hole have to be to make it possible for humans to go through it?
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10/12/22

Which one has the greatest average speed during an entire game: a baseball, football, or soccer ball? Why?

I said a baseball because it travels faster than the other balls. Is this correct.
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10/12/22

How to find: instantaneous speed vs average speed without the use of calculus?
Suppose you hold a ball out over a cliff and let go. how would you find the instantaneous speed after 10 seconds and the avg speed after 10 seconds? I thought you could just find the displacement... more
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10/12/22

Is this statement true: “If an object’s velocity is zero, its acceleration must be zero"
I said it is true because if an object is not moving then it must have no acceleration.I got confused because I wasn't sure if it stated 0 was the avg velocity or not.any help would be appreciated.
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Physics

10/12/22

Center of Mass, Impulse, Momentum, and Collisions
You are driving a truck of mass 5 650 kg at 13 m/s. You accidentally hit a parked car. The car and the passengers have a total mass of 984 kg. (a) What is the speed of the car and the truck after... more
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Physics

10/12/22

A block of mass 60.0 kg is suspended at rest by two cables shown below. The top is ceiling, and the left side is wall.
a) Calculate the tension force T1b) Calculate the tension force T2
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Physics

10/12/22

Blocks A and B are connected by a string that passes over a frictionless pulley. Mass of block A is 10kg, the mass of block B is 25kg. Coefficient of fiction between block A and incline surface is.08
a) Write down the Newton's component equations for A and B.b) Find the acceleration of block A and the tension force of the string
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Physics

10/11/22

Two masses of 15.0kg and 20.0kg are connected by a light string that passes over a frictionless pulley
a) Calculate acceleration of the systemb) Calculate the tension of the string
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Physics

10/11/22

At what speed does the dish move? (momentum: inelastic collision)
In a restaurant, one cook slides a 245-g delicious pizza down the counter from left to right at 1.63 m/s. At nearly the exact same time, another cook launches a 349-g cheeseburger along the same... more
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Physics

10/11/22

What is the speed of the ball traveling? (momentum conservation)
A 90.0 kg man jumps straight up (with no horizontal component of velocity) and catches a horizontally traveling ball. He catches the 0.430 kg ball exactly at the peak of his leap, which is ... more
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Physics

10/11/22

Need help with this question.
Two objects mass m1 = 5.00 kg and mass m2= 3.00 kg are connected by a light string that passes over a frictionless pulley, as in Figure.  Express your answer using 3 significant figures.(a) What is... more
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Physics

10/11/22

Please help me!
If you doubled the mass and then tripled the radius of a planet, by what factor would the acceleration due to gravity at its surface change?
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Physics

10/11/22

Please show work!
Calculate the force of Earth's gravity on a spacecraft 3.00 Earth radii above the Earth's surface if its mass is 1600 kg.     Radius of the Earth = 6.37 × 106 m Mass of the Earth = 5.96 ×... more
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Physics

10/11/22

Please show work !
If the coefficient of kinetic friction between a 17 kg crate and the floor is 0.29, what horizontal force is required to move the crate at a steady speed across the floor?
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Physics

10/11/22

please help! :(
Can a coefficient of friction exceed 1.0? 
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Physics

10/10/22

a small object of mass 1.0kg is hanging from an ideal spring with spring constant a at 0.1m above the equilibrium position and it’s velocity is -0.52m/s. What is the period of oscillation?
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Physics

10/10/22

Distance and Displacement

A person standing at the edge of the cliff kicks a stone over the edge at a speed of 20 m/s. The cliff is 70 m above the surface below. With what speed does it strike the ground below?
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Physics

10/09/22

If an object is in equilibrium, which of the following is necessarily true?

If an object is in equilibrium, which of the following is necessarily true?A. The object's center of mass is not moving nor is it rotating.B. The object's center of mass is not moving.C. The object... more
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Physics Math Calculus

10/09/22

Related rates calculus

A road perpendicular to a highway leads to a farmhouse located a = 1.7 km away (See figure below).An automobile travels past the farmhouse at a speed of v = 45 km/h. How fast is the distance... more
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Physics

10/09/22

Distance and Displacement

A car travels west for 45 kilometers. It then turns south for 60 kilometers. The entire trip took 2 hours. What is the magnitude and direction of the car's average velocity? What was the car's... more
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