12,795 Answered Questions for the topic physics

Physics

11/04/22

Find Angular Velocity

A uniform 2 kg solid disk of radius R = 0.4 m is free to rotate on a frictionless horizontal axle through its center. The disk is initially at rest, and then a 10 g bullet traveling at 510 ... more
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Physics

11/04/22

Physics homework
A race car rounds a curve at 56 m/s. The radius of the curve is 441 m, and the car's mass is 645 kg. (Assume the car's speed remains constant. Take the radially inward direction to be positive.... more
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Physics

11/04/22

A hiker makes four straight-line walks A 32 km at 140 ◦ B 27 km at 291 ◦ C 12 km at 55 ◦ D 18 km at 302

How far from the starting point is the hiker after these four legs of the hike? All angles are measured in a counter-clockwise direction from the positive x-axis. Answer in units of km.
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Physics Trigonometry

11/04/22

Trig Extra Credit Question
how would you solve for theta in the problem cos(theta)* sin(theta)= 0.14?
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Physics

11/03/22

1kg equals about 2.2 lbs on Earth A) if you weigh 100 lbs what is your mass in kg, B) what is your weight in newtons
This is a question on a homework assignment that I can't figure out. I'm not sure how to set up the equationanswer the problem by using the equation for force (F=ma) and (W=mg)
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Physics

11/03/22

a 500kg VW bug and a 1500kg car truck are given equal accelerations how much greater is the force that acts on the truck than the car?
This is a question on a homework assignment that I can't figure out. I'm not sure how to set up the equationanswer the problem by using the equation for force (F=ma) and (W=mg)
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Physics

11/03/22

what is the acceleration given to a 25kg block of cement when it is pulled sideways with a net force of 480N? draw the free body diagram for the forces acting on the block of cement
This is a question on a homework assignment that I can't figure out. I'm not sure how to set up the equationanswer the problem by using the equation for force (F=ma) and (W=mg)
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Physics

11/03/22

calculate the horizontal force needed to make a 3.8 kg baseball accelerate at a 641m/s^2

is part of a worksheet and I don't know how to solve it and need helpanswer the problem by using the equation for force (F=ma) and (W=mg)
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Physics

11/03/22

The toy car in the image runs off the edge of a table that is 1.225 m high. The car lands 0.400 m from the base of the table. a. How long did it take the car to fall?
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Physics

11/03/22

During World War I, the Germans had a gun called Big Bertha that was used to shell Paris.
The shell had an initial speed of 2.12 km/s at an initial inclination of 78.7 ◦ to the horizontal. The acceleration of gravity is 9.8 m/s 2 . -How far away did the shell hit? -How long was it in... more
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Physics

11/03/22

You are standing at the top of a cliff that has a stairstep configuration.

There is a vertical drop of 3 m at your feet, then a horizontal shelf of 6 m , then another drop of 7 m to the bottom of the canyon, which has a horizontal floor. You kick a 0.74 kg rock, giving it... more
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Physics

11/03/22

A projectile is fired upward at an angle of 30˚ with the horizontal from the top of a tower 35 m high above a level ground.

Find the range on the horizontal plane will the ball hit the ground after 25 seconds
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Physics

11/03/22

At a time of 10 s after being fired, a cannonball strikes a point 500 m horizontally and 100 m vertically above the point of launch.
1.With what initial velocity was the cannonball launched?2. What maximum height was attained by the ball?3. What is the direction of the ball’s velocity just before it strikes the given point?
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Physics

11/02/22

A problem using Newton's Second Law of Motion
A 4.00-kg object has a velocity of 3.00i m/s at one instant. Eight seconds later, its velocity has increased to (8.00i + 10.0j) m/s. Assuming the object was subject to a constant total force, find... more
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Physics

11/01/22

Balancing equations C2H6 + O2 => 3H2O + 2CO2
chemical balance this equation C2H6 + O2 => 3H2O + 2CO2
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Physics

11/01/22

vector magnitude and angle
A)Determine the magnitude of the sum of the three vectors V⃗ 1=8.0i^−9.0j^,V⃗ 2=i^+j^V→1=8.0i^−9.0j^,V→2=i^+j^, and V⃗ 3=−2.0i^+5.0j^V→3=−2.0i^+5.0j^.b)Determine the angle (in degrees) of the sum... more
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Physics

11/01/22

what is the difference between current and electricity?
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Physics

10/31/22

Two people are pulling on a sign with strings.
two people (person A and B) are pulling on a sign with strings. Person A is pulling with a force of 5N at an angle of 100° from the positive x-axis and person B is pulling with a force of 2N at an... more
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Physics

10/30/22

Find the gradients of the following functions: (a) f (x, y, z) = x2 + y3 + z4. (b)
Find the gradients of the following functions:(a) f (x, y, z) = x2 + y3 + z4.(b)
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Physics

10/29/22

Physic Normal Forces
Mountain goats can easily scale slopes angled at 60° from horizontal. What are the normal force and the static friction force acting on a mountain goat that weighs 900 N and is standing on such a... more
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Physics

10/29/22

A person stands directly in front of two speakers
A person stands directly in front of two speakers that are emitting the same pure tone. The person then moves to one side until no sound is heard. At that point, the person is 6.65 m from one of... more
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Physics

10/29/22

In a student laboratory exercise, the wavelength of a 48,300 Hz ultrasound wave is measured to be 0.716 cm. Find the air temperature (in K).
In a student laboratory exercise, the wavelength of a 48,300 Hz ultrasound wave is measured to be 0.716 cm. Find the air temperature (in K).
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Physics

10/29/22

Two children stretch a jump rope

Two children stretch a jump rope between them and send wave pulses back and forth on it. The rope is 4.3 m long, its mass is 0.56 kg, and the force exerted on it by the children is 35 N.(a)What is... more
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Physics

10/28/22

Physics: Gravity

Diwata-1 (aka PHL-Microstat-1) was launched to the International Space Station on March 23, 2016. It was the first Philippine microsatellite and the first satellite built and designed by Filipinos.... more
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Physics

10/28/22

: Rotational Equilibrium and Rotational Dynamics
You turned on your classroom ceiling fan at its lowest setting. You measured that the rotation is 250 rev/min. When adjusted to its maximum setting, the speed increases to 450 rev/min in 15 s. (a)... more
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