A bulldozer attempts to drag a log weighing 500 N along the rough horizontal ground
The cable attached to the log makes an angle of 30° above the ground. The coefficient of static friction between the log and the ground is 0.50, and the coefficient of kinetic friction is 0.35. What minimum tension is required in the cable in order for the log to begin to slide?
220 N
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If a body's acceleration is doubled then the amount of force acting on the body had to _______
a. double b. halve c. stay the same d. None of the other choices are correct.
A 60-W and a 100-W light bulb are rated at 120V. Which bulb has a higher resistance?
A) 60-W bulb B) 100-W bulb C) both the same.
An electron is released from rest at a distance of 9.00 cm from a proton. If the proton is held in place, how fast will the electron be moving
when it is 3.00 cm from the proton? (mel = 9.11 x 10-31 kg, e = 1.60 × 10-19 C, k = 1/4??0 = 8.99 × 109 N ? m2/C2) A) 75.0 m/s B) 106 m/s C) 130 m/s D) 1.06 × 103 m/s E) 4.64 × 105 m/s
Seismic waves that travel through our planet are called ______________ waves
a. Earth b. planet c. body d. ground