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A train engine pulls out of a station?
along a straight horizontal track with five identical freight cars behind it,each of which weighs 93.5 kN. The train reaches a speed of 11.0 m/s within 5.50 min of starting out. Assuming the engine pulls with a constant force during this interval, and ignore air resistance and friction on the freight cars. Find the tension in the coupling between cars 2 and 3.
1 AnswerPhysics1 decade agoA bag of potatoes with weight 38.0 N is suspended from a string that exerts a force of 45.3 N.?
If the bag's acceleration is upward at 1.70 m/s2, what is the mass of the potatoes?
1 AnswerPhysics1 decade agoA force of 16 N is directed at an angle of 30° above the x-axis.?
A second force of 16 N is directed at an angle of 30° below the x-axis. What is the vector sum of these two forces?
magnitude _________ N
direction __________ ° counterclockwise from the positive x-axis
2 AnswersPhysics1 decade agoA 3.0-kg block, starting from rest, slides down a frictionless incline of length 3.6 m.?
When it arrives at the bottom of the incline, its speed is vf. At what distance from the top of the incline is the speed of the block 0.50vf?
3 AnswersPhysics1 decade agoYou are pulling a suitcase through the airport at a constant speed.?
The handle of the suitcase makes an angle of 30.9° with respect to the horizontal direction. If you pull with a force of 45.0 N parallel to the handle, what is the force of friction acting on the suitcase?
1 AnswerPhysics1 decade agoA 2049-kg elevator moves with an upward acceleration of 1.8 m/s2.?
What is the tension in the cable that supports the elevator?
3 AnswersPhysics1 decade ago