12,815 Answered Questions for the topic physics

Physics

10/24/22

Please help me!
A 0.150 kg baseball pitched at 40.0 m/s is hit on a horizontal line drive straight back at the pitcher at 50.0 m/s.a) If the contact time between bat and ball is 3.90 ×10−3 s, calculate the... more
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Physics

10/24/22

Please help me !
A 15 kg hammer strikes a nail at a velocity of 8.5 m/s and comes to rest in 6.0 ms.a) What is the impulse given to the nail?  b) What is the average force acting on the nail?  Express answers using... more
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Physics

10/24/22

Please help me!

A 7100 kg boxcar traveling 12.0 m/s strikes a second car. The two stick together and move off with a speed of 4.60 m/s.  What is the mass of the second car?  Express your answer using three... more
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Physics

10/24/22

physics homework help
A circus performer is shot out of a cannon and flies over a vertical net that is places at a horizontal distance of 8.80m from the cannon. When the cannon is aimed at an angle of 40 degrees above... more
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Physics

10/24/22

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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Physics

10/24/22

An aluminum wing on a passenger jet is 38 m long when its temperature is 28°C. At what temperature would the wing be 9 cm (0.09 m) shorter?
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Physics

10/24/22

An aluminum vat is 19 m long at room temperature (20°C). How much longer is it when it contains boiling water at 1 atm pressure?
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Physics

10/24/22

i need help with this physics
As a gasoline engine is running, an amount of gasoline containing 12,000 J of chemical potential energy is burned in 1 s. During that second, the engine does 4,000 J of work.(a)What is the engine's... more
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Physics

10/24/22

i need some help in this questions

A machinist wishes to insert a brass rod with a diameter of 7 mm into a hole with a diameter of 6.998 mm. By how much would the machinist have to lower the temperature (in °C) of the rod to make it... more
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Physics Calculus

10/22/22

Find the instantaneous rate of change of the volume with respect to time.
The radius of a right circular cylinder is given by √(t + 2) and its height is 1/2√t,where t is time in seconds and the dimensions are in inches. Find theinstantaneous rate of change of the volume... more
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Physics Math

10/22/22

Physics (Helps pls)
A flower pot falls from a ledge of a window building. the ledge is 80m high. How long will it take the pot to hit the ground?
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Physics

10/21/22

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
A hiker makes four straight-line walks A 12 km at 86 ◦ B 23 km at 222 ◦ C 17 km at 172 ◦ D 31 km at 122 ◦ in random directions and lengths starting at position (41 km, 41 km),
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Physics

10/21/22

A girl delivering newspapers travels 3 blocks west, 6 blocks north, then 5 blocks east. What is the magnitude of her resultant displacement? .
Find the direction (measured from due east, with counterclockwise positive) of her displacement. What is the total distance she travels? Answer in units of blocks
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Physics Calculus

10/21/22

Find t when the instantaneous acceleration is zero given S = t 3 − 4t 2 + 2t − 6.
Find t when the instantaneous acceleration is zero given S = t3 − 4t2 + 2t − 6.
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Physics

10/21/22

Kinematics in One Dimension ( Free Fall)
A ball is dropped from a height of 60ft above ground. Find the time it takes to hit the ground.Should I first convert 60ft. to meters? or just directly substitute it on the equation.
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Physics Calculus

10/21/22

A point moves along a path with an equation S = 36t − 1/3 t^3 + 24 where S is in meters and t is in seconds. Find the acceleration of the point when t = 1.
S = 36t − 1/3 t^3 + 24t = 1
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Physics

10/20/22

a computer is accelerated out a window at 8m/s/s. how much force was need for this acceleration?
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Physics

10/20/22

Physics elastic potential energy question

A spring-loaded toy uses a compressed spring to fire a marble out of a tube. A force of 220 Ncompresses the spring by 0.14 m. Calculate the elastic potential energy of the toy.
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Physics

10/20/22

Physic(s) Work Force of Particle
A particle moves in a straight line, parallel to the x axis, from xi to xf. It is acted upon by a force that is also parallel to the x axis and is given by f(x)= b/xA.Write an expression for the... more
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Physics Math

10/19/22

Physics (Vectors)

Solve the given problem using the parallelogram method and with the aid of protractor and ruler. Find the resultant of P = 6 km, 30 N of E and Q = 10 km, 50 NW.
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Physics Math

10/19/22

Physics (Vectors) and thanks for the help

    Use the polygon method to determine the resultant of the following displacement.(Scale: 1 km = 1 cm) D1 = 2.0 km to the east, D2 = 5 km, 35 N of E, and D3 = 7.0 km, 60 N of W.
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Physics

10/19/22

Please help me!
How long will it take a 1750 W motor to lift a 305 kg piano to a sixth-story window 16.0 m above the ground?
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Physics

10/19/22

Please help me!
A satellite of mass, mS, is in a circular orbit of radius, rS, around the Earth, determine its kinetic energy, K. Express your answer in terms of some or all of the variables mS, rS, and constants... more
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Physics

10/19/22

Please help me!
A vertical spring (ignore its mass), whose spring constant is 880 N/m, is attached to a table and is compressed down by 0.150 m. a) What upward speed can it give to a 0.340 kg ball when released?b)... more
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Physics

10/19/22

Please help me!
In the high jump, the kinetic energy of an athlete is transformed into gravitational potential energy without the aid of a pole. With what minimum speed must the athlete leave the ground in order... more
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