Recent Homework Questions About Physics
A stunt driver wants to make his car jump over 8 cars parked side by side below a horizontal ramp. A)With what minimum speed must he drive off the horizontal ramp? The vertical height of the ramp is 1.5 m above the cars and the horizontal distance he must clear is 22..(I got ...
Friday, December 6, 2013 at 11:55pm
A 2.41 kg ball is attached to a ceiling by a 1.86 m long string. The height of the room is 3.38 m. The acceleration of gravity is 9.81 m/s 2 . What is the gravitational potential energy associated with the ball relative to a) the ceiling? Answer in units of J b) the floor c)a ...
Friday, December 6, 2013 at 9:01pm
a student is riding in an elevator moving vertically down at a constant speed V. If the mass of the student is M, the power delivered to the student by the normal force of the elevator floor is: +MgV zero -MgV MgV^2
Friday, December 6, 2013 at 8:29pm
A 4.0 × 103 kg car accelerates from rest at the top of a driveway that is sloped at an angle of 19.6◦ with the horizontal. An average frictional force of 4.0×103 N impedes the cars motion so that the cars speed at the bottom of the driveway is 4.9...
Friday, December 6, 2013 at 7:54pm
In question no.2 a) torque would be 2*F*r/2? I am confused that from top view, which force we have to use?
Friday, December 6, 2013 at 7:03pm
Physics Classical Mechanics
This makes no sense.
Friday, December 6, 2013 at 5:54pm
Vo = 16m/s[20o] Yo = 16*sin20 = 5.47 m/s. Y = Yo + g*t = 0 At max. Ht. 5.47 - 9.8t = 0 9.8t = 5.47 Tr = 0.558 s. = Rise time Tf = Tr = 0.558 s. = Fall time. T = Tr+Tf = 0.558 + 0.558 = 1.12 s.
Friday, December 6, 2013 at 2:07pm
Is not work for me, i tried but i dont know what im doing wrong
Friday, December 6, 2013 at 10:35am
a = (V-V)/t = (44-0)/0.028 = 1571 m/s^2 F = m*a = 0.49 * 1571 = 770 N.
Friday, December 6, 2013 at 12:24am
See previous post: Thu,12-5-13,3:00 PM.
Thursday, December 5, 2013 at 10:12pm
T= F = m*a = 454 * 3.51 = 1594 N.
Thursday, December 5, 2013 at 4:12pm
A. Hb=(Do/Dw)*Ho=(730/1000)*0.2=0.146 m Below the the water. Ha = 0.2 - 0.146 = 0.054 m Above water. B.Mc=V*D = 0.2^3m^3 * 730kg/m^3=5.84 kg. = Mass of cube. (Mc+Mo)/Vc = Dw(Density of water). (5.84+Mo)/0.008 = 1000kg/m^3 5.84 + Mo = 8 Mo = 2.16 kg = Mass of object to be added.
Thursday, December 5, 2013 at 3:00pm
Tuesday, December 3, 2013 at 2:09pm
In a physics study group, a friend says in a profound tone that light is the only thing we can see. After a few laughs, your friend goes on to say that light is produced by the connection between electricity and magnetism. Is your friend correct? My responds is that my friend ...
Saturday, August 24, 2013 at 4:54pm
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Friday, November 21, 2008 at 12:29am