Get college assignment help at uniessay writers in Fig. 9-67, block 1 of mass m1 slides from rest along a frictionless ramp from height h = 2.50 m and then collides with stationary block 2, which has mass m2 = 2.00m1. After the collision, block 2 slides into a region where the coefficient of kinetic friction μk is 0.500 and comes to a stop in distance d within that region. What is the value of distance d if the collision is (a) elastic and (b) completely inelastic?
A bucket of mass 2.00 is whirled in a vertical circle of radius 1.45 . At the lowest point of its motion the tension in the rope supporting the bucket is 23.0 .Q. WHAT IS THE SPEED OF THE BUCKET AND How fast must the bucket move at the top of the circle so that the rope does not go slack?
A toy cannon uses a spring to project a 5.40 g soft rubber ball. The spring is originally compressed by 5.09 cm and has a force constant of 7.97 N/m. When the cannon is fired, the ball moves 15.3 cm through the horizontal barrel of the cannon, and there is a constant frictional force of 0.0322 N between the barrel and the ball. a)at what point does it have its max speed? b)what is the max speed?
100 kW (10^5 W) of power is delivered to the other side of a city by a pair of power lines, between which the voltage is 12,000V. a.)Show that the current in the lines is 8.3A. b.)If each of the two lines has a resistance of 10 Ohms, show that there is a 83-V change of voltage along each line. c.)Show that the power expended as heat in both lines together is 1.38 kW d.)How do your calculations support the importance of stepping voltages up with transformers for long-distance transmission?
A Federation starship (1.0 106 kg) uses its tractor beam to pull a shuttlecraft (1.0 104 kg ) aboard from a distance of 8 km away. The tractor beam exerts a constant force of 4.0 104 N on the shuttlecraft. Both spacecraft are initially at rest. How far does the starship move as it pulls the shuttlecraft aboard?
A hot-air balloon is ascending at the rate of 12 m/s and is 84 m above the ground when a package is dropped over the side. (a) How long does the package take to reach the ground?
An airplane with a wing span of 30 m flies horizontally at a location where the downward component of the Earth’s magnetic field is 5.0 × 10-5 T. Find the magnitude of the induced emf between the tips of the wings when the speed of the plane is 320 m/h.
A 18000 airplane lands with a speed of 72 on a stationary aircraft carrier deck that is 115 long. Find the work done by nonconservative forces in stopping the plane.
73.0 kg man stands on a spring scale in a descending elevator. the elevator descends at 10m/s. The elevator takes 3.0 s to stop. what is man’s weight while elevator is braking?
A car of mass M = 800 kg traveling at 40.0 km/hour enters a banked turn covered with ice. The road is banked at an angle theta, and there is no friction between the road and the car’s tires.
Get college assignment help at uniessay writers The figure shows a simple model of a seesaw. These consist of a plank/rod of mass and length allowed to pivot freely about its center (or central axis), as shown in the diagram. A small sphere of mass is attached to the left end of the rod, and a small sphere of mass is attached to the right end. The spheres are small enough that they can be considered point particles. The gravitational force acts downward. The magnitude of the acceleration due to gravity is equal to .
she has a mass of 49 kg, an initial velocity of 27 m/s, and a velocity of 8 m/s at the top of the ramp, what is the work done by friction on the skateboarder? Ignore the kinetic energy of the wheels of the skateboard.
A 2.98 kg block initially at rest is pulled to the right along a horizontal surface by a constant, horizontal force of 19.8 N. The coefficient of kinetic friction is 0.11. The acceleration of gravity is 9.8 m/s2 . Find the speed of the block after it has moved 2.35 m.
An 8.0 m, 300 N uniform ladder rests against a smooth wall. The coefficient of static friction between the ladder and the ground is 0.55, and the ladder makes a 50.0° angle with the ground. How far up the ladder can an 870 N person climb before the ladder begins to slip?
A 74 kg diver steps off a 14 m tower and drops from rest straight down into the water. If he comes to rest 4.4 m beneath the surface, determine the average resistance force exerted on him by the water.
A golfer can hit a golf ball a horizontal distance of over 300 m on a good drive. What maximum height will a 301.5 m drive reach if it is launched at an angle of 25.0 degrees to the ground?
Four particles with masses m1 = 17 kg, m2 = 22 kg, m3 = 1 kg, and m4 = 32 kg sit on a very light (massless) metal sheet and are arranged as shown below. Find the moment of inertia of this system with the pivot at the following point. (Assume the rotation axis is parallel to the z direction, perpendicular to the plane of the drawing)
Romeo (76.0 kg) entertains Juliet (56.0 kg) by playing his guitar from the rear of their boat at rest in still water, 2.80 m away from Juliet, who is in the front of the boat. After the serenade, Juliet carefully moves to the rear of the boat (away from shore) to plant a kiss on Romeo’s cheek. How far does the 85.0 kg boat move toward the shore it is facing?
Determine how many calories of heat must be removed to change 100g of vapor at 240°C to solid at 20°C. Consider the following properties of the substance: heat of fusion 300 cal/g, heat of vaporization 600 cal/g, specific heat capacity as a liquid -0.75 cal/g-Co, melting point at 20°C and boiling point of 240°C.
The blade of a windshield wiper moves through an angle of 90.0 in 0.46 s. The tip of the blade moves on the arc of a circle that has a radius of 0.37 m. What is the magnitude of the centripetal acceleration of the tip of the blade?
What is the acceleration of two falling sky divers (mass 106.0 kg including parachute) when the upward force of air resistance is equal to one-fourth of their weight?
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