(A) A particular 1.89 x 107 kg train is able to get up to 25 m/s in a 58 second interval, starting from rest on straight, horizontal track. If the acceleration of the train is constant, what is the magnitude of the net force? (B) During this interval, find the magnitude of the horizontal force and the vertical force exerted on a 77 kg passenger by the train?

Boxes of several sizes rest on a frozen pond, which serves as a frictionless horizontal surface. A) If a fisherman applies a force with magnitude 26 N to a box and produces an acceleration of 8.5 m/s2, what is the mass of the box? B) What magnitude of force is required to give a 500 kg box an acceleration of 1.6 m/s2? C) If a force with magnitude 58 N is applied to a box with mass 120 kg, what acceleration is produced?

A block on a horizontal frictionless surface with mass m=6.1 kg is connected to a 3.2 kg hanging mass by means of a light wire that passes over a frictionless pulley. Find the magnitude of the acceleration of the two blocks.

A 58 kg person is parachuting and experiencing a downward acceleration of 2.8 m/s2. The mass of the parachute is 3.1 kg. (a) What is the upward force on the open parachute from the air? (b) What is the magnitude of the downward force on the parachute from the person?

B- A man of mass M = 80.0 kg and woman of mass m = 54.0 kg stand facing each other on an ice rink, both wearing ice skates. The woman pushes the man with a horizontal force of F = 80.0 N in the positive x- direction. Assume the ice is frictionless. (a) What is the man's acceleration? (b) What is the reaction force acting on the woman? (c) Calculate the woman's acceleration.

a) A particular 1.89 × 10^7 kg train is able to get up to 25 m/s in a 58 second interval,starting from rest on straight, horizontal track. If the acceleration of the train isconstant, what is the magnitude of the net force? b) During this interval, find the magnitude of the horizontal force and the vertical forceexerted on a 77 kg passenger by the train? c) Find the magnitude of the horizontal and vertical force exerted on the train by thepassenger from part (B).

The graph in the figure shows the x component of the acceleration of a 2.4-kg object as a function of time (in ms). (a) At what time(s) does the x component of the net force on the object reach its maximum magnitude? (a) What is the maximum magnitude of the x component of the net force on the object? (b) What is the x component of the net force on the object at time t= 0 ms and at t=4 ms? (m/s}- > (ms) 10 20

A 9.0 kg object experiences an acceleration of 3.4 m/s2. (a)What is the magnitude of the resultant force acting on it (in N)? (b)If this same force is applied to a 5.4 kg object, what is the magnitude of the acceleration (in m/s2)?

A force applied to an object of mass m1 produces an acceleration of 4.00 m/s2. The same force applied to the second object of mass m2 produces an acceleration of 1.80 m/s2. (a) What is the value of the ratio m1/m2? (b) If m1 and m2 are combined into one object, find its acceleration under the action of the force F.

The 1 kg standard body has an acceleration of 2.00 m/s2 at 41° to the positive direction of the x axis. (a) What are the x and y components of the net force on it? x component      N y component      N (b) What is the net force in unit-vector notation? =         N