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The upward normal force exerted by the floor is 610 N on an elevator passenger who weighs 660 N.
A) What is the reaction force to the upward normal force exerted by the floor?
B) What is the reaction force to weight of the passenger?
a car is driven along a circular track. the track road is flat. the car starting from rest increases its speed
An unknown mass of tin is heated to a temperature of 202 C. It is placed into 200 g of water which is in a 100 g copper cup initially at 10 C. How much heat is gained by the cup and the water
A mass of 1.60 kg stretches a vertical spring 0.335 m. If the spring is stretched an additional 0.164 m and released, how long does it take to reach the (new) equilibrium position again.
A bird, starting from its nest (we'll call that the origin), flies 24.0 km due southeast. It then changes directions and flies 26.0 km in a direction 60° north of east. Find the magnitude and direction of its resultant displacement.
A 36 µF air-?lled capacitor is charged to apotential di?erence of 1099 V. What is the energy stored in it
For a spring-mass oscillator, if you triple the mass but keep the stiffness the same, what numerical factor does the period change? That is, if an original period was T and the new period is bT, what is b? It is useful to write out the expression ..
A 45.0-kg girl is standing on a 144-kg plank. The plank, originally at rest, is free to slide on a frozen lake, which is a flat, frictionless surface. What is her velocity relative to the surface of ice
A particle moves along the path y= -0.500x^2 (meters) with a constant speed of 5 m/s. Assume dx/dt >= 0. Determine the Cartesian components of velocity
In an effort to pump up you decide to hit the gym and lift weights everyday of the week. Your favorite lift, which you per- form every trip to the gym, is the bench press. This lift involves lifting a 125 lb.
How many 111 W lightbulbs can you use in a 107 V circuit without tripping a 16 A circuit breaker? (The bulbs are connected in parallel, that means that the potential difference across each lightbulb is 107 V.)
An organ pipe is open at both ends. The frequency of the fourth harmonic is 316 Hz higher than the frequency of the third harmonic. what is the length of the organ pipe
two identical blocks are stacked one on top of the other. the bottom block is free to slide across a frictionless surface. What is the maximum horizontal force that can be applied to the lower block without the upper block slipping
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