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In an action movie, the heroine is supposed to jump with a motorcycle from the roof of one skyscraper to another one. The roof of the second skyscraper is h=10 meters lower, and the gap between the buildings is d=14 meters wide. Both roofs are horizontal and flat. Neglecting air resistance, what minimum initial speed would she need to make the jump?
A golfer imparts a speed of 27.3m/s to a ball, and it travels the maximum possible distance before landing on the green. How much time does the ball spend in the air
Earth has a mass of 5.98 × 1024 kg. The average mass of the atoms that make up Earth is 40 u. How many atoms are there in Earth
The force on a wire carrying 8.70A is a maximum of 1.25N when placed between the pole faces of a magnet. what is the approximate strength of the magnetic field
The coefficient of kinetic friction between a refrigerator (mass 125 kg) and the floor is 0.18, What is the minimum force required to keep it moving with a constant velocity
Two rigid rods are oriented parallel to each other and to the ground. The rods carry the same current in the same direction. The length of each rod is 0.90m, and the mass of each is 0.078 kg. One rod is held in place above the ground, while other flo..
A circular wheel has a radius R = 0.45 + or - 0.02 m. The wheel is observed to be rotating uniformly with period T = 2.00 +or- 0.05 s. Compute the frequency with which the wheel spins
Calculate the number of electrons in a steel (iron) pinhead. The pinhead may be assumed to be spherical with diameter 2 mm
A 20 g bullet inelastically collides with a 3 kg wooden block at rest. find How much energy is lost in the collision
The speed of a passenger train is 16mph faster than the speed of a frieght train. The passenger train travels 330 miles in the same time it takes the frieght train to travel 250miles. find the speed of each train.
A body is placed on a plane that is incline at an angle of 35degrees to the horizontal, Determine the component of mg parallel to the surface
After the Sun exhausts its nuclear fuel, its ultimate fate may be to collapse to a white dwarf state. Calculate the average density of the white dwarf
A glass rod is initially neutral. It is then rubbed against a silk cloth. Afterwards, the rod has a charge of +5.0 C, How many electrons did the glass rod lose or gain
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