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Get college assignment help at uniessay writers A stunt man whose mass is 71.4 kg swings from the end of a 4.25 m long rope along the arc of a vertical circle. Assuming that he starts from rest when the rope is horizontal, find the tensions in the rope that are required to make him follow his circular path at each of the following points. (a) at the beginning of his motion N (b) at a height of 1.49 m above the bottom of the circular arc N (c) at the bottom of the arc N

Please answer this question it has three parts. Thanks

A baseball pitcher throws a fastball at a speed of 47 m/s. The acceleration occurs as the pitcher holds the ball in his hand and moves it through an almost straight-line distance of 3.5 m. Calculate the acceleration, assuming that it is constant and uniform.

A projectile is fired straight upward at 101 m/s. How fast is it moving at the instant it reaches the top of its trajectory? Answer in units of m/s.

In one of the original Doppler experiments, a tuba was played on a moving flat train car at a frequency of 79 Hz, and a second identical tuba played the same tone while at rest in the railway station.What beat frequency was heard in the station if the train car approached the station at a speed of 19.0 m/s?

A gray kangaroo can bound accross a flat stretch of ground with each jump carrying it 11 m from the takeoff point. If the kangaroo leaves the ground at a 18 degree angle, what is its takeoff speed?

Overview and Objective: You will fire a paintball into a pendulum bob and measure how far it moves horizontally. Knowing that the pendulum swings in a circular arc allows you to calculate to what height it rose. From the maximum height to which it rose, you can then deduce the velocity it had at the bottom of the swing (using conservation of mechanical energy). The velocity at the bottom of the swing is the velocity after the collision of the paintball with the pendulum bob. Next you invoke conservation of momentum to figure out the velocity of the paintball before the collision — and that’s the objective. You will also measure the velocity of the paintball independently (using a dual photogate timer) to compare your mechanical measurements with the electronic measurements. This comparison will give you further ammunition in deciding whether or not the conservation laws were justifiably and correctly applied in this experiment. Experimental Setup: The apparatus shown in the figure consists of a pendulum bob (labeled canister) and a paintball marker mounted inside a wooden box. The pendulum bob is suspended from the ceiling. A paintball is propelled from a paintball marker by high pressure CO2 gas. 1→Define the paintball plus pendulum bob as a system at the instant that the paintball collides with the bob. Do any external forces act on this system? Illustrate your answer using a free body diagram. 2→Will momentum be conserved during the collision? Is any approximation involved? Explain. 3→Will momentum to be conserved while the pendulum is swinging? Explain. 4 → Since the velocity and therefore the momentum of the pendulum and ball are zero at the height h, how can we say that momentum is conserved in the experiment? Explain. 2 5→Comment in a couple of lines upon the following statement: “The momentum of the paintball and bob could not be conserved in this experiment because of the large frictional forces between the bob and the entering paintball.” 6→ What percentage error is produced in vpend by using the approximate relationship for h obtained from the binomial expansion? Explain. See pages 3 and 4 of the lab handout. 7→ Does using the approximation increase or decrease the calculated value of vpend? 8→Combine Equations [2], [5] and [7] in the lab handout to obtain a single expression for the velocity of the paintball, vball, in terms of d, L, g, mball and mpend.

a rotating cylinder about 16 km long and 7.0 km in diameter is designed to be used as a space colony. With what angular speed must it rotate so that the residents on it will experience the same acceleration due to gravity as on Earth?

A light plane is headed due south with a speed of 151 km/h relative to still air. After 1.06 hour, the pilot notices that they have covered only 127 km and their direction is not south but southeast (45.0^circ).

A skier is accelerating down a 30.0° hill at a = 4.40 m/s2 (Fig. 3-48).What is the vertical component of her acceleration?

Get college assignment help at uniessay writers In Fig. 9.6, a weightlifter’s barbell consists of two identical spherical masses each with radius 0.17 m and mass of 50 kg. The weights are connected by a 0.96-m steel rod with mass of 12 kg. Find the moment of inertia of the barbell through the axis at the center.

A 1.25-kg ball begins rolling from rest with constant angular acceleration down a hill. If it takes 3.60 s for it to make the first complete revolution, how long will it take to make the next complete revolution?

In Fig. 8.3, a bullet of mass 0.01 kg moving horizontally strikes a block of wood of mass 1.5 kg which is suspended as a pendulum. The bullet lodges in the wood, and together they swing upward a distance of 0.40 m. What was the velocity of the bullet just before it struck the wooden block? The length of the string is 2 meters. Please provide step-to-step method in solving the problem. Attached is the figure.

A 3.50-m-long, 400 steel beam extends horizontally from the point where it has been bolted to the framework of a new building under construction. A 75.0 construction worker stands at the far end of the beam. What is the magnitude of the torque about the point where the beam is bolted into place?

what kcal/m3 stand for?

Lillian (mass 42.0 kg) standing on slippery ice catches her leaping dog (mass 15 kg) moving horizontally at 2.0 m/s. What is the speed of Lilian and her dog after the catch?

A Federation starship (9.5 106 kg) uses its tractor beam to pull a shuttlecraft (7.0 104 kg ) aboard from a distance of 18 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?

Two objects attract each other gravitationally with a force of 2.7 10-10 N when they are 0.25 m apart. Their total mass is 4.0 kg. Find their individual masses. larger mass kg smaller mass kg

A basketball rolls off of the roof of a house with a velocity of15 m/s. The roof makes an angle of 23 degrees with the horizontal. If the edge of the roof is 10 meters high, determine how far from the base of the house the basketball hits .

The density of ice is 917 kg/m3 and the density of sea water is 1025 kg/m3. A swimming polar bear climbs onto a piece of floating ice that has a volume of 5.2 m3. What is the weight of the heaviest bear that the ice can support without sinking completely beneath the water?

. The text discusses several methods of studying human behavior. These include the case study, naturalistic observation, correlational research, survey research, and the experimental method. If you were going to design a study investigating the relationship between alcohol and violence, which of these methods would you choose and why? What would be the relative strengths and weaknesses of this study? What ethical considerations must be taken into account while undertaking this study?

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November 3, 2019