Get college assignment help at uniessay writers A mechanic pushes a 3.0 multiplied by 103 kg car from rest to a speed of v, doing 4900 J of work in the process. During this time, the car moves 26.0 m. Neglecting friction between car and road, find each of the following.
A toy car was rolling on top of a table that is 1.225 meters above the ground. It eventually launches horizontally off of the table and takes the path of a projectile until it hits the ground 40 centimeters from the edge of the table
An unstable nucleus with a mass of 18.0 10-27 kg initially at rest disintegrates into three particles. One of the particles, of mass 4.0 10-27 kg, moves along the positive y-axis with a speed of 6.0 106 m/s. Another particle, of mass 7.4 10-27 kg, moves along the positive x-axis with a speed of 4.0 106 m/s. (Assume that mass is conserved.) (a) Determine the third particle’s speed. 1 m/s (b) What is the direction of motion? 2° (from the positive x-axis)
The net work done in accelerating a propeller from rest to an angular speed of 296 rad/s is 3366.1 J. What is the moment of inertia of the pro- peller? Answer in units of kg · m2.
33. A 12.0-g bullet is fired horizontally into a 100-g wooden block that is initially at rest on a frictionless horizontal surface and connected to a spring having spring constant 150 N/m. The bullet becomes embedded in the block. If the bullet-block system compresses the spring by a maximum of 80.0 cm, what was the speed of the bullet at impact with the block? V = 273 m/s
A circular-shaped object of mass 7 kg has an inner radius of 8 cm and an outer radius of 25 cm. Three forces (acting perpendicular to the axis of rotation) of magnitudes 11 N, 26 N, and 16 N act on the object, as shown. The force of magnitude 26 N acts 28◦ below the horizontal. Find the magnitude of the net torque on the wheel about the axle through the center of the object. Answer in units of N · m.
A wheel rotates with a constant angular accel- eration of 4.35 rad/s2. Suppose that the initial angular speed of the wheel is 2.99 rad/s. Through what angle does the wheel rotate after 2.88 s? Answer in units of rev.
the man and the platform together weigh 1200 N. The pulley can be modeled as frictionless. Determine how hard the man has to pull on the rope to lift himself steadily upward above the ground.
Glowing plasma is evident in the light from?
A 4.5 m diameter merry-go-round is rotating freely with an angular velocity of 0.70 rad/s. Its total moment of inertia is 1800 kg*m^2. Four people standing on the ground, each of mass 62 kg, suddenly step onto the edge of the merry-go-round. What is the angular velocity of the merry-go-round now? What if the people were on it initially and then jumped off in a radial direction (relative to the merry-go-round)?
Get college assignment help at uniessay writers A 240 kg crate is pushed horizontally with a force of 715 N. If the coefficient of friction is 0.20, calculate the acceleration of the crate.
A wheel 45.0 cm in diameter accelerates uniformly from 240 rpm to 350 rpm in 5.0 s. How far will a point on the edge of the wheel have traveled in this time?
A 76 kg skier starts from rest at the top of a ski slope 48 meters high, if the frictional forces do –14.6 kJ of wok on her as she descends, once at the bottom the skier is moving horizontally and comes across a patch of soft snow, where the coefficient of kinetic friction is 0.11. If the patch is 78 meters wide and the average force of air resistance on the skier is 179 newtons, how fast is she going after crossing the patch? (Note you must have first found the skier speed at the bottom of the hill in order to do this part.) Give your answer in m/s to the first decimal place.
Through what angle in degrees does a 33 rpm record turn in 0.25 s?
Two bicycle tires are set rolling with the same initial speed of 3.20 along a long, straight road, and the distance each travels before its speed is reduced by half is measured. One tire is inflated to a pressure of 40 and goes a distance of 18.0 ; the other is at 105 and goes a distance of 92.1 . Assume that the net horizontal force is due to rolling friction only and take the free-fall acceleration to be = 9.80 .
The block of mass (M) is placed on a dynamic slide tack connected by the string to a mass (m) hanging over a pulley. As the mass released and starts to fall, the block will slide across the track. Question:How would the results have differed in this experiment if the pulley and of the track was lower that the other end of the track?
44. Two automobiles of equal mass approach an intersection. One vehicle is traveling with velocity 13.0 m/s toward the east and the other is traveling north with speed v2i. Neither driver sees the other. The vehicles collide in the intersection and stick together, leaving parallel skid marks at an angle of 55.0° north of east. The speed limit for both roads is 35 mi/h, and the driver of the northward-moving vehicle claims he was within the speed limit when the collision occurred. Is he telling the truth? V = 41.5 mi/h
An 11.0 m, 240 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 900 N person climb before the ladder begins to slip?
28. A 7.0-g bullet is fired into a 1.5-kg ballistic pendulum. The bullet emerges from the block with a speed of 200 m/s, and the block rises to a maximum height of 12 cm. Find the initial speed of the bullet. V = 530 m/s
A bullet is fired at an angle of 60o with an initial velocity of 200.0 m/s. How long is the bullet in the air? What is the maximum height reached by the bullet?
An Olympic long jumper leaves the ground at an angle of 23o and travels through the air for a horizontal distance of 8.7 before landing. What is the takeoff speed of the jumper?
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