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The speed of a bobsled is increasing because it has an acceleration of . At a given instant in time, the forces resisting the motion, including kinetic friction and air resistance, total 500 N. The mass of the bobsled and its riders is 300 kg. (a) What is the magnitude of the force propelling the bobsled forward? (b) What is the magnitude of the net force that acts on the bobsled?
If the ball was hit when it was 1.2m above the ground, what horizontal distance does it travel before it lands on the building
A positive point charge Q is on the y axis at y = D; a negative point charge -2Q is at the point x = D, y = D. Find the potential for points on the x axis
A person is riding a bicycle, and its wheels have an angular velocity of +23.0 rad/s. What is the angular acceleration of each wheel
A flywheel in a motor is spinning at 560 when a power failure suddenly occurs. The flywheel has mass 40.0 and diameter 75.0. The power is off for 34.0, and during this time the flywheel slows down uniformly due to friction in its axle bearings. Durin..
What is the speed of the arrow as it leaves the bow. At a height of 5 meters above the surface of a lake, a sound pulse is generated. The echo from the bottom of the lake returns to point of origin 0.130 s later. The air and water temperatures are ..
A hunter on a frozen, essentially frictionless pond uses a rifle that shoots 4.20g bullets at 975m/s. Find the recoil speed of the hunter if he fires the rifle horizontally
Two cars of mass 2000 kg and 1000 kg, respectively, collide inelastically. Their velocity after impact is 4 m/s, Find the initial speed and direction of the lighter car
person 1.6 m tall stands 5.2 m from a reflecting globe in a garden. How large is the person's image
The reactance of a capacitor is 2.5 k? at a frequency of 1.5 kHz. What is the capacitance in nano-farads
A 15 g bullet traveling at 485 m/s strikes a 0.9 kg block of wood that is balanced on a table edge 0.7 m above ground. If the bullet buries itself in the block, find out distance D at which the block hits the floor.
A thin rectangular plate of uniform area density ?1 = 1.14 kg/m2 has a length a = 0.540 m and a width b = 0.230 m. find the distance from the origin of the resulting plate's center of mass
An 84.6-kg climber is scaling the vertical wall of a mountain. His safety rope is made of nylon that, How much is the rope stretched when it breaks his fall and momentarily brings him to rest
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