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1) Albert pushes a 6-kg box across a level floor. He pushes with a force of 43 newtons, and observes that the box accelerates in the direction of his push at a rate of 2 m/s2. What must be the net force acting on the box?
2) Assuming that Albert's push and the friction with the floor are the only horizontal forces acting, what must be the magnitude of the frictional force pushing backward on the box?
A large wooden turntable in the shape of a flat disk has a radius of 1.90m and a total mass of 150kg. Find the angular speed of the turntable after the parachutist lands
a long pipe of outer radius 3.40 cm and inner radius 2.89 cm carries a uniform charge density of 2.22 mcm3. using
Find out the shear strain that results if a force of magnitude 5.00×105 is applied to the top square face of the plate, parallel to the side, and a force of equal magnitude is applied in the opposite direction to the bottom face of the plate as s..
The focal length of a simple magnifier is 7.60 cm. Assume the magnifier to be a thin lens placed very close to the eye. what is the height of its image formed by the magnifier
an elevator is able to raise a 1000 kg mass to a height of 40 m in 15 s.a how much work does the elevator do?b what is
A 2.8 kg rectangular air mattress is 2 m long, 0.5 m wide, and 0.1 m thick. What mass can it support in water before sinking.
What is the circumference of Neo? (Hint: Apply the technique used by Eratosthenes to measure Earth's circumference.)
A conducting rod is moved in a magnetic field of 0.5T as shown. The bar is 0.4m long and has a velocity of 12 m/s. What is the induced voltage across the bar
A container of volume V is divided by partitions into three parts containing one kilomole of helium gas, Calculate the kilomole fraction and the partial pressure of each gas in the mixture
A hot-air balloon consists of a basket, one passenger, and some cargo. Let the total mass be M. Find the upward lift force in terms of the initial total weight Mg
Why is optical pyrometry commonly used above the gold point and not below it? What objects typically have their temperatures measured in this way?
A 3-kg steel ball strikes a wall with a speed of 13-m/s at an angle of 60.0° with the surface. It bounces off with the similar speed and angle. If the ball is in contact with the wall for 0.20s, what is the average force exerted by the wall on the..
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