A train, A, with a mass of 19,000 kg is travelling at 90 km/h when it...

A train, A, with a mass of 19,000 kg is travelling at 90 km/h when it strikes a second train, B, which has a mass of 17,000 kg and is moving in the same direction at a speed of 43.2 km/h. If the coefficient of restitution for the collision is 0.87 and all resistances to motion are negligible, then

(i) calculate the speed of the trains A and B immediately after the impact.

(ii) as a result of damage during the collision trains A and B have a constant friction resistance to the motion of 14,500 N. Calculate the distance that the train B will move before coming to rest.

Expert Solution

samet mamat answered 2 years ago

Train driving 5 % uphill (2.9o) with speed 120 km/h. Train total mass is 100 000...

Train driving 5 % uphill (2.9o) with speed 120 km/h. Train total mass is 100 000 kg. The gear ratio is 1 (no transmission) and the train wheel diameter is 1 m. (Give the answer of accuracy of at least three significant digits.) Calculate the required torque: Answer kNm Calculate the required power:

A train has a mass of 4.82E+6 kg and is moving at 69.9 km/hr. The engineer...

A train has a mass of 4.82E+6 kg and is moving at 69.9 km/hr. The engineer applies the brakes, which results in a net backward force of 1.91E+6 N on the train. The brakes are held on for 28.2 s. What is the new speed of the train? How far does it travel during this period?

A container with mass m kg is dropped by a helicopter from height h km at...

A container with mass m kg is dropped by a helicopter from height h km at time t=0, with zero velocity. from the outset, its fall is controlled by gravity and the force of air resitance, f(v)= -kv, where v is the current velocity of the container. in t seconds after the drop, a parachute opens, resulting in an increase of air resistance up to f(v) = -kv. determine the time t at which the container touches the ground. and...

A 1,000-kg car moving east at 90 km/h collides head-on with a 1,500-kg car moving west...

A 1,000-kg car moving east at 90 km/h collides head-on with a 1,500-kg car moving west at 50 km/h, and the two cars stick together. (a) Which way does the wreckage move and with what initial speed? (b) How much KE is lost in the collision?

A train at a constant 48.0 km/h moves east for 42.0 min, then in a direction...

A train at a constant 48.0 km/h moves east for 42.0 min, then in a direction 47.0° east of due north for 27.0 min, and then west for 52.0 min. What are the (a) magnitude and (b) angle (relative to east) of its average velocity during this trip?

A sports car of mass 1000 kg can accelerate from rest to 72. km/h in 6.6...

A sports car of mass 1000 kg can accelerate from rest to 72. km/h in 6.6 s. a) What would the average force of the car's engine be? b) If the same force acts on 2000 kg car what is the acceleration.

A meteoroid of mass = 555 kg has a speed of 90.0 m/s when 700 km...

A meteoroid of mass = 555 kg has a speed of 90.0 m/s when 700 km above the Earth. It is falling vertically (ignore air resistance) and strikes a bed of sand in which it is brought to rest in 3.49 m. (a) How much work does the force of gravity do on the meteoroid on the way to the surface? GJ (b) What is the speed of the meteoroid just before striking the sand? m/s (c) How much work...

A train car with mass m1 = 576 kg is moving to the right with a...

A train car with mass m1 = 576 kg is moving to the right with a speed of v1 = 7 m/s and collides with a second train car. The two cars latch together during the collision and then move off to the right at vf = 4.4 m/s. A)What is the initial momentum of the first train car? B)What is the mass of the second train car? C)What is the change in kinetic energy of the two train system...

1. A train moving at a constant speed of 52.0 km/h moves east for 38.0 min,...

1. A train moving at a constant speed of 52.0 km/h moves east for 38.0 min, then in a direction 45.0° east of due north for 21.0 min, and then west for 65.0 min. What is the average velocity of the train during this run? a) magnitude- km/h b) ° (counterclockwise from east) 2. A golf ball is struck at ground level. The speed of the golf ball as a function of time is shown in the figure below, where...

A train, travelling with velocity v = 0.8c, enters a tunnel. The train has proper length...

A train, travelling with velocity v = 0.8c, enters a tunnel. The train has proper length 100m and the tunnel has proper length 80m. When the center of the train coincides with the center of the tunnel, two gates located at either end of the tunnel come crashing down. The three events (the center of the train reaching the center of the tunnel, the front gate closing and the rear gate closing) occur simultaneously in the stationary reference frame. a)...

Question