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Q. A race car has a mass of 701 kg. It starts from rest and travels 40 m in 3.0 s. The car is uniformly accelerated during the entire time. What net force is exerted on it?
Q. A person desires to reach a point that is 3.40 km from her present location and in a direction that is 350 north of east. However, she must travel along streets that are oriented either north-south or east-west. What is the minimum distance she could travel to reach her destination?
Constable Bob inspected skid marks near a traffic accident to determine the acceleration of initial velocity of lawn mower involved in the accident. Bob measured the lawn mower skid marks to be 32 m long. Witnesses said the lawn mower was skiddin..
A rod is initially at a uniform temperature of 0 o C throughout. One end is kept at 0oC , and the other is brought into contact with a steam bath at 100 o C.
The coefficient of static friction between the wall and the rod is μs = 0.575. Determine the minimum distance x from point A at which an additional weight w (the same as the weight of the rod) can be hung without causing the rod to slip at point A.
A Carnot air conditioner takes energy from the thermal energy of a room at 294 k and transfers it as heat to the outdoors, which is at 309 k. for eacg joule of electric energy needed to operate the air conditioner, how many joules are removed from..
A real object is placed at the zero end of a meterstick. A large concave mirror at the 100 cm end of the meterstick forms an image of the object at the 70.0cm position. A small convex mirror placed at the 20 cm position forms a final image at the ..
A 45.4 kg girl is standing on a 144 kg plank. The plank, at first at rest, is free to slide on a frozen lake, which is a flat, frictionless surface. The girl begins to walk along the plank at a constant velocity of 1.60 m/s relative to the plank. Wha..
An object, mass 1.48 kg, moves in a horizontal circle with a radius of 1.52m. The object has an intial velocity of 28.0 m s-1. If the kinetic coefficient of friction between object and surface is 0.382.
A coiled telephone cord forms a spiral with 56 turns, a diameter of 1.30 cm, and an unstretched length of 60.0 cm. Determine the self-inductance of one conductor in the unstretched cord.
A convex Lens of focal length 18 cm is used as the magnifying glass. At what distance from a tiny insect should you hold this lens to get a magnification of +3.00.
The perspective provided by Multiple-Concept is useful here. The highest barrier that a projectile can clear is 15.60 m, while the projectile is launched at an angle of 23.0 ° above the horizontal. What is the projectile's launch speed.
a car with a mass 1865 kg is travelling west and slows down uniformly to 8.5 m/s over a distance of 108 m. calculate the initial speed of the car if the required braking force is 7525 N
A gas expands from I to F. The energy added to the gas by heat is 442 J when the gas goes from I to F along the diagonal path. What is the change in internal energy of the gas.
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