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A 900- sports car collides into the rear end of a 2700- SUV stopped at a red light. The bumpers lock, the brakes are locked, and the two cars skid forward 3.0 before stopping. The police officer, e
The two upper front teeth of a person exert a total force of 30 N on a piece of steak. If the biting edge of each tooth measures 10 mm x 1 mm, find the pressure on the steak.
After a day of testing race cars, you decide to take your own 1410 kg car onto the test track. While moving down the track at 10.0 m/s, you uniformly accelerate to 31.0 m/s in 10 s. What is the ave
An 11.5-kg mass, m(sub)1, on a frictionless table is accelerated by a 6.0-kg mass, m(sub)2, hanging over the edge of the table. What is the acceleration of the mass along the table?
The bar has length 1.26 . What is the tension in the wire in the right side of the bar? What is the tension in the wire in the left side of the bar?
Derive the expression for the electric field inside the volume at a distance r from the axis of the cylinder in terms of the charge density p.
At the turning point, how far is the second cyclist from the campground? What direction (measured relative to due east) must the second cyclist head during the last part of the trip?
A uniform electric field with a magnitude of 250 N/C is directed in the positive x direction. A 12 uC charge moves from the origin to the point(20.0 cm, 50.0 cm). what is the change in the electric
An interstellar spacecraft races by the Earth at a velocity of 1.85×108 m/s, as measured by observers on the Earth. The spacecraft's galley cook places a pot of Minute® rice on the stove f
When it leaves the spotlight, the circular beam of light has a diameter of about 0.10 m, and diffraction causes the beam to spread as the light travels to the moon. In effect, the first circular dar
How far does the motorcycle travel from the moment it starts to accelerate (at time t_1) until it catches up with the car (at time t_2)?
A diving board length L = 6.00 m that weighs 210 N is supported by two pillars. One pillar is at the left end of the diving board, as shown below; the other is distance d = 1.60 m away. Find the ma
Three hours later, it shifts due north, and its speed slows to 96 km/h. How far from Grand Bahama is the eye 4.50 h after it passes over the island?
Two wires a and b of circular cross section are made of the same metal and have equal lengths, but the resistance of wire a is three times greater than that of wire b. what is the ratio of their cr
An airtight box has a removable lid of area 2.0 10-2m2 and negligible weight. The box is taken up a mountain where the air pressure outside the box is 0.75 105Pa. The inside of the box is completel
What is the relationship between air resistance and surface area?
What must the charge (sign and magnitude) of a particle of mass 1.42g be for it to remain stationary when placed in a downward-directed electric field of magnitude 670N?
Both disks are charged to - 30 nC. What is the electric field strength a point on the axis 5.0 rm cm from one disk between them?
Using 1.013 × 105 Pa for the atmospheric pressure and 1030 kg/m3 for the density of the sauce, find the absolute pressure PB in the bulb when the distance h is (a) 0.16 m and (b) 0.13 m.
A spacecraft is in a circular orbit of radius 3.0 x 10^4 km around a 2.0 x 10^30 kg pulsar. The magnetic field of the pulsar at that radial distance is 1.0 x 10^2 T directed perpendicular to the vel
The tension in the string is 27 N. (a) What is the wave speed? (b) Find the linear density of this string in grams per meter.
What angles do the plus and minus first order diffracted beams make with the direction of the zero-order transmitted beam?
If the ball is thrown upward with the same initial velocity but in air instead of a vacuum, it reaches a height of 8.4 meters. what is the drag force (assuming that is constant) on the ball during t
A grindstone of radius 4.0m is initially spinning with an angular speed of 8.0 rad/s. The angular speed is then increased to 10 rad/s over the next 4.0 seconds. Assume that the angular acceleration
While rearranging a dorm room, a student does 306 J of work in moving a desk 3.4 m. What was the magnitude of the applied horizontal force.