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Q. It is 155cm from your eyes to your toes. You're standing 190cm in front of the tall mirror. How far is it from your eyes to the image of your toes?
Q. A 2600 kg car travels at a speed of 27 m/s around a 20 degree curve of radius 93 m. (gravity: 9.8) 1. What is the net centripetal force needed to keep the car from skidding sideways? 2. Were there no friction between the car's tires and the road, what centripetal force could be provided just by the banking of the road? 3. Now assume the friction is sufficient to keep the car from skidding. Calculate the magnitude of the normal force exerted on the car by the road's surface. 4. Compute the magnitude of the friction force. 5. Compute the lowest possible value of the static friction that would prevent the car from skidding.
A 80 kg person sits on a 4 kg chair. Each leg of the chair makes contact with the floor in a circle that is 1.3 cm in diameter. Find the pressure in pascals exerted on the floor by each leg of the chair, assuming the weight is evenly distributed.
A hockey player is standing on his skates on the frozen pond when an opposing player, moving with a uniform speed of 13 m/s, skates by with the puck. After 2.5 s, the first player makes up his mind to chase his opponent.
A chair of weight 130 lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of = 45.0 fixed at an angle of 39.0below the horizontal and the chair slides along the floor.
A 5.00--long ladder has mass 12.5 kg and is leaning against a frictionless wall, making a 64 degree angle with the horizontal. If the coefficient of friction between the ladder and ground is 0.42, what is the mass of the heaviest person who can safel..
After being accelerated to a speed of 1.26×105 m/s, the particle enters a uniform magnetic field of strength 2.00 T and travels in a circle of radius 35.0 cm (determined by observing where it hits the screen). The results of this experiment allow one..
What minimum constant acceleration does the aircraft require if the aircraft is to be airborne after a takeoff run of 222m.
A 2.46×10^4 rocket blasts off vertically from the earth's surface with a constant acceleration. Throughout the motion considered in the problem, suppose that remains constant. Inside the rocket, a 15.10 instrument hangs from a wire that can support a..
A slab of marble is resting on the ground. It weighs 600 N and has the dimensions 0.1m x 0.2m x 1.0m. What is the greatest pressure that the slab can exert on ground.
What is the maximum speed with which a 1350kg car can round a turn of radius 71m on a flat road if coefficient of static friction between tires and road is 0.40.
At t = 0, a particle leaves the origin with the velocity of 9 m/ s in the positively direction and moves in the x y plane with a constant acceleration of (2.0i - 4.0j) m/ s2. At the instant the x coordinate of the particle is 15m, what is the spee..
Barometric pressure in the eye of a hurricane is 0.91atm (27.2 in of mercury). How does the level of the ocean surface under the eye compare with the level under the distant fair-weather region where the pressure is 1.0atm.
Charge A and charge B are 2.5 m apart. Charge A is 1.4C and charge B is 2.5C. Charge C, which is 2.0 C, is situated between them and force on charge C is zero. How far from charge A is Charge C.
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