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A railroad handcar is moving along straight, frictionless tracks with negligible air resistance. In the following...
A railroad hopper car filled with sand is rolling with an initial speed of 15 m/s on straight, horizontal tracks. You c...
A railroad hopper car filled with sand is rolling with an initial speed of 15 m/s on straight, horizontal tracks. You can ignore frictional forces on the railroad car. The total mass of the car plus sand is 85,000 kg. The hopper door is not fully closed so sand leaks out the bottoms. After 10 minutes, 13,000 kg of sand has leaked out. So I thought that because it does not say that it is elastic or inelastic that I...
Two railway cars are on a straight railroad track. The first, with mass 8000 kg, moves...
Two railway cars are on a straight railroad track. The first, with mass 8000 kg, moves slowly at a velocity of 0.05 m/s to the right in the direction of the second car of mass 15000 kg, which is stationary. (a) What is the total momentum (relative to the ground) of both cars together? kg m/s They collide and stick to each other. What is the total momentum right after the collision? For the short times involved, you can take...
An object with cross section A is shot horizontally across frictionless ice. Its initial velocity is v0x at t0=0s. Air resistance is not negligible. A 1.8 m wide, 1.5 m high, 1700 kg car with a drag c...
An object with cross section A is shot horizontally across frictionless ice. Its initial velocity is v0x at t0=0s. Air resistance is not negligible. A 1.8 m wide, 1.5 m high, 1700 kg car with a drag coefficient of 0.35 hits a very slick patch of ice while going 24 m/s . Air resistance is not negligible. If friction is neglected, how long will it take until the car's speed drops to 11 m/s ? To 5.0 m/s ?
A 1190-kg flatbed train car rolls along frictionless tracks at a speed of 0.132 m/s. A...
A 1190-kg flatbed train car rolls along frictionless tracks at a
speed of 0.132 m/s. A 62.2-kg man stands on the flatbed and, in
order to stop the car, runs to the edge and jumps off.
0.132 m/s If the car's final velocity is zero, what is the final speed v of the man? m/s
A locomotive of mass m= 1.134 X 105 kg uses 37.8 kW of power to accelerate...
A locomotive of mass m= 1.134 X 105 kg uses 37.8 kW of power to accelerate at a constant rate for 15.0 s. a) The locomotive has an initial velocity of 0.500 m/s east. Calculate the locomotive’s speed after 15.0 s. After 15.0 s, the locomotive travels east at a constant speed and then collides and couples with a train of four cars. Each of the cars has half the mass of the locomotive. Before the collision, the train was...
A 1.20 103 kg railroad car is traveling at 9.00 m/s when it bumps into and...
A 1.20 103 kg railroad car is traveling at 9.00 m/s when it bumps into and connects to a 0.45 10 raroad car that is moving down the tracks in the same direction but with a speed of 3.55 m/s. After they connect together they both continue on. A) What properties are conserved within this system: energy, momentum, both, or neither? B) What is the initial momentum and energy of the first car? C) What is the initial momentum and...
An 8.57 kg mass moving east at 14.1 m/s on a frictionless horizontal surface collides with...
An 8.57 kg mass moving east at 14.1 m/s on a frictionless horizontal surface collides with a 10.9 kg mass that is initially at rest. After the collision, the 8.57 kg mass moves south at 2.50 m/s. What is the magnitude of the velocity of the 10.9 kg mass after the collision? Tries 0/8 Submit Answer What is the angle relative to the east? Submit Answer Tries 0/8 What percentage of the initial kinetic energy is lost in the collision?...
A) An object of mass 2.75 kg is moving with a velocity v = (3.50î −...
A) An object of mass 2.75 kg is moving with a velocity
v = (3.50î −
5.20) m/s.
What is the angular momentum of the mass relative to the origin
when it is at the location (1.50, −1.50, 1.50) m? (Express your
answer in vector form.)
L = ? kg · m2/s
B) Suppose you start an antique car by exerting a force of 270 N
on its crank for 0.315 s. What angular momentum is given to the
engine...
p mv 6. A 0.5 kg blue dynamics cart is moving with an initial velocity of...
p mv 6. A 0.5 kg blue dynamics cart is moving with an initial velocity of -2 m/s when it collides with a 0.25 kg red dynamics cart. The red cart is initially moving with a velocity of +4 m/s. As a result of the collision, the blue dynamics cart has a final velocity of +0.8 m/s. What is the final velocity of the red cart? 7. Starting from rest, a 1600 kg car is subject to a net force...
The driver of a car of mass M which is moving along a straight road with...
The driver of a car of mass M which is moving along a straight road with initial speed v0 sees a deer in her headlights, and reacts quickly, lifting her foot of the gas and applying the brake pedal with maximum force. The anti-lock brakes cause the largest possible static friction force to be applied on the tires by the road, which continue to roll so the car does not skid. The coefficient of static friction between the tires and...
A 1190-kg flatbed train car rolls along frictionless tracks at a
speed of 0.132 m/s. A 62.2-kg man stands on the flatbed and, in
order to stop the car, runs to the edge and jumps off.
0.132 m/s If the car's final velocity is zero, what is the final speed v of the man? m/s
A 1.20 103 kg railroad car is traveling at 9.00 m/s when it bumps into and connects to a 0.45 10 raroad car that is moving down the tracks in the same direction but with a speed of 3.55 m/s. After they connect together they both continue on. A) What properties are conserved within this system: energy, momentum, both, or neither? B) What is the initial momentum and energy of the first car? C) What is the initial momentum and...
An 8.57 kg mass moving east at 14.1 m/s on a frictionless horizontal surface collides with a 10.9 kg mass that is initially at rest. After the collision, the 8.57 kg mass moves south at 2.50 m/s. What is the magnitude of the velocity of the 10.9 kg mass after the collision? Tries 0/8 Submit Answer What is the angle relative to the east? Submit Answer Tries 0/8 What percentage of the initial kinetic energy is lost in the collision?...
A) An object of mass 2.75 kg is moving with a velocity
v = (3.50î −
5.20) m/s.
What is the angular momentum of the mass relative to the origin
when it is at the location (1.50, −1.50, 1.50) m? (Express your
answer in vector form.)
L = ? kg · m2/s
B) Suppose you start an antique car by exerting a force of 270 N
on its crank for 0.315 s. What angular momentum is given to the
engine...
p mv 6. A 0.5 kg blue dynamics cart is moving with an initial velocity of -2 m/s when it collides with a 0.25 kg red dynamics cart. The red cart is initially moving with a velocity of +4 m/s. As a result of the collision, the blue dynamics cart has a final velocity of +0.8 m/s. What is the final velocity of the red cart? 7. Starting from rest, a 1600 kg car is subject to a net force...
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