Answered: A darts player throws a dart…

A darts player throws a dart horizontally at a board 2m away with speed u. The dart hits the board at a point 10cm below the level at which it was released. The initial speed, u, of the dart is

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

On turning a corner, a motorist rushing at finds child on the road 50 m ahead. He instantly stops the engine and applies brakes, so as to stop the car within 10 m of the child. Calculate (a) the retardation and (b) time required to stop the car.
A hunter observed a bird flying overhead and estimated the His rifle is If he fires at height at 15 m and its speed at 20 m/second. capable of a muzzle velocity of 48 m/sec. the instant the bird is directly overhead, at what angle should he incline his rifle in order to hit it? How many meters from his position will the bird hit the ground assum- ing that the weight of the bullet compared to the weight of the bird is negligible?
Q1 (a) Figure Q1 (a) shows a baskerbail game. The player is trying to shoot the ball at point A, at 60° angle with distance 5.6 m from the hoop and the hoop is 3 m off the ground. Neglect the size of the ball. Use g-9.81m's. Determine the velocity, VA, required for the ball to enter the hoop if the ball is shoot at at 2.X metres off the ground メース Hints: Use the vertical displacement given. I VA 20 e = 60° 3m 2Xm 5.6m Figure Ql (a)
The tank is to be placed on a hill that is 1 km high above the ground. The enemy’s base is located at a horizontal distance of 10 km away and it is in a valley 0.5 km below the ground. Air resistance is neglected. Gravitational acceleration is constant and equal to 9.8?/?2 downwards. If the bomb is to be fired perfectly horizontally, what should the launching speed of the bomb be in order to hit the target? What is the duration it would take the bomb to hit the target? Find x(t) and y(t). Consider the initial location of the tank to be (0, 1 km)? Draw the trajectory of the bomb (x and y coordinates). Indicate clearly the value of x (horizontal displacement) when the bomb reaches the ground level. 5. Draw the (?), ??(?), and ??(?) vertical above each other. Indicate key values on the graphs such as the start, the end, the maximum, the minimum and the x and y intercepts. PART 4 and 5 PLEASE.
2. A 0.600-kg particle has a speed of 2.00 m/s at point A and kinetic energy of 7.50 J at point B. What is (a) its kinetic energy at A? (b) its speed at B? (c) the total work done on the particle as it moves from A to B?
3. A ball is thrown so that it just clears a 10 ft fence 60 feet away. If the ball If the ball left the hand 5 ft. above the ground at an angle of 60° to the horizontal, what was the initial velocity of the ball?
Q5. A man is standing ( 2 m ) above the ground, throws a stone at an angle of (65°) as shown in the figure below. If the time required for the stone to reach the ground is (2 sec ). calculate: (a) The initial velocity (v.) of the stone (b) The horizontal distance ( x ), where the stone hits the ground. Take ( x, = 0) and ( y. = 0) 2 m
2. A ball is dropped from the top of a building 150m high, at the same instant another is thrown upward from the ground. The balls pass each other at a ooint 60 m above the ground. What was the initial velocity of the second ball:
A projectile is shot directly away from Earth's surface. Neglect the rotation of the Earth. What multiple of Earth's radius RE gives the radial distance (from the Earth's center) the projectile reaches if (a) its initial speed is 0.325 of the escape speed from Earth and (b) its initial kinetic energy is 0.325 of the kinetic energy required to escape Earth? (Give your answers as unitless numbers.) (c) What is the least initial mechanical energy required at launch if the projectile is to escape Earth? (a) Number i (b) Number i (c) Number i Units Units Units ✪ î
A rocketship has 9 modules each with a mass of 15 200 kg and moves at a speed of 7.0 km/s. One of the modules is explosively propelled away from the rocketship at a speed of 1350 km/h with respect to the rocketship, opposite in direction from the original travel direction of the rocket ship.What is the resulting change in the speed of the rocketship?
A ball is thrown vertically upward from the top of a 30-m high building with an initial velocity of 98 m/s. At the same instant, another ball is thrown upward from the top of another 25-m high building with an initial velocity of 196 m/s. Determine the height from the ground and the time at which they pass. Illustrate the problem.