Exercise 3:
A truck engine of mass 5,000 kg is pulling a trailer of mass 1,000 kg along a level track
at an acceleration of 0.10 m/s2. The resistances are 10 N per 1,000 kg for the truck
engine and 5 N per 1,000 kg for the trailer.
5,000 kg
a = 0.10 m/s2
1,000 kg 10
00 0 0
1,000 kg
towbar
(a) Draw a free body diagram of the engine and the trailer.
(b) Calculate: (i) the tension in the connecting tow bar between the engine and the
trailer, and
(105 N)
(ii) the forward thrust exerted by the engine.
(655 N)
END

An charge with mass m and charge q is emitted from the origin, (x,y)=(0,0). a large, flat screen is located at x=l. there is a target on the screen at y position y(h), where y(h) > 0. in this problem, you will examine two different ways that the charge might hit the target. ignore gravity in this problem. 1.assume that the charge is emitted with velocity v(0) in the positive x direction. between the origin and the screen, the charge travels through a constant electric field pointing in the positive y direction. what should the magnitude e of the electric field be if the charge is to hit the target on the screen? express your answer in terms of m, q, y(h), v(0), and l. 2.now assume that the charge is emitted with velocity v(0) in the positive y direction. between the origin and the screen, the charge travels through a constant electric field pointing in the positive x direction. what should the magnitude e of the electric field be if the charge is to hit the target on the screen? express your answer in terms of m, q, y(h), v(0), and l.