A car travelling at a horizontal path (starting from rest) encounter a resistance four times its velocity. If the engine thrust 400 lbs to the direction of motions and the car weighs 600 lbs, then at what time the car can attain a velocity of 99 ft/sec? 18.45 seconds 21.45 seconds 24.45 seconds 25.14 seconds

A car travelling at a horizontal path (starting from rest) encounter a resistance four times its velocity. If the engine thrust 400 lbs to the direction of motions and the car weighs 600 lbs, then at what time the car can attain a velocity of 99 ft/sec? 18.45 seconds 21.45 seconds 24.45 seconds 25.14 seconds

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

An engine of mass 50 tonnes pulls a train of mass 300 tonnes up an incline of 1 in 100. The trainstarts from rest and moves with a constant acceleration against a total resistance of 50 newtons pertonnes. If the train attains a speed of 36 km.p.h. in a distance of 1 kilometre,i) calulate the total force of engine and train. 3ii) estimate the power of the train.
Application of de A motorboat and its load weigh 2,450 N. AssumIng that the propeller force is constant and equal to 120 N, and water resistance is equal numerically to 7.50v N, where v is the speed at any instant in m/sec., and if the boat starts from rest, determine the speed and the distance traveled at the end of 10 seconds.
Small steel balls fall from rest through the opening at A at the steady rate of 3 per second. Find the vertical separation h of two consecutive balls when the lower one has dropped 2.0 meters. Neglect air resistance.
A 180-lb man and a 120-lb woman stand side by side at both ends of the 300-lb boat, ready to dive, each with a 16-ft/s speed relative to the boat. Determine the speed of the boat after they both dive, if (a) the woman dives first, (b) the man dives first. (show your solution) choices of correct answer: 3.0723 km/hr ; 0.251 km/hr 13.0723 km/hr ;1.251 km/hr 10.095 km/hr; 10.2815 km/hr 18.0723 km/hr; 0.521 km/hr 0.251 km/hr; 8.0723 km/hr
In a particular crash test, a car of mass 1780 [kg] collides with a wall. The initial and final speeds of the car are 26 [m / s] and 2.7 [m / s], respectively. If the collision takes a time of 0.0677 [s], find the average force exerted by the car. (Note that to the left the velocity is negative and to the right it is positive)
A baseball (m = 0.18 kg) has an initial velocity of v=-35 m/s as it approaches a bat. We have chosen the direction of approach as the negative direction. The bat applies an average force F that is much larger than the weight of the ball, and the ball departs from the bat with a final velocity of v=58 m/s. Determine the impulse applied to the ball by the bat.
Blocks A and B shown in figure below have a mass of 10 kg and 100 kg, respectively. Determine the distance B travels when it is released from rest to the point where its speed becomes 2 m/s.
A 50,000 lb box car going 25 mi/h is to be hitched to a gondola carrying bulk copper ore (netweight = 100,000 lb). Determine the velocity of both the railroad cars after being hitched if thegondola is initially at rest. Determine the time it takes for both railroad cars to come to rest. μk (Gondola)= 0.30
A 1-lb stone is dropped down the “bottomless pit” at Carlsbad Caverns and strikes the ground with a speed of 95 ft/s. Neglecting air resistance, (a) determine the kinetic energy of the stone as it strikes the ground and the height h from which it was dropped. (b) Solve part aassuming that the same stone is dropped down a hole on the moon. (Acceleration of gravity on the moon = 5.31 ft/s2).
A hockey puck is traveling to the left with a velocity of v1 = 10 m/swhen it is struck by a hockey stick and given a velocity of v2 = 20 m/s as shown. Determine the magnitude of the net impulse exerted by the hockey stick on the puck. The puck has a mass of 0.2 kg
A block A of 60.0 lb is connected to a block B of 10.0 lb by means of a rope and an ideal pulley. The system is released from rest. Between block A and the surface, there is a coefficient of kinetic friction of 0.10. Block A has descended 5.00 ft. At this moment, determine: a. The displacement of block B.b. The magnitude of the tension in the rope.c. The speed of block B.d. The speed of block A.
A trailer truck enters a 2 percent uphill grade traveling at 72 km/h and reaches a speed of 108 km/h in 300 m. The cab has a mass of 1800 kg and the trailer 5400 kg. Determine (a) the average force at the wheels of the cab, (b) the average force in the coupling between the cab and the trailer.