Q1.a) Find the direction and magnitude of an electric field that exerts a westward force on an electron.b) what magnitude and direction force does this field exert on a proton
Q2. An electron gun has parallel plates separated by 4.00cm and gives electrons 25.0KeV of energy
a) what is the electric field strength between the plates. b)what force will this field exert on a piece of plastic with a 0.500μF charge that gets between the plates?
Q3. Find the total capacitance of the combination of capacitors. C1=1μF C2 =5μF C3=8 μF
(7) As a car of mass m kg drives up a slope at an angle α to the horizontal it experiences a
constant resistive force FN and a driving force D N.What can be deduced about the work
done by D as the car moves a distance d metres uphill if:
(i) the car moves at constant speed?
(ii) the car slows down?
(iii) the car gains speed?
The initial and final speeds of the car are denoted by um/s and vm/s respectively.
(iv) Write v
in terms of the other variables.
A projectile of mass 56kg is moving at a constant speed of 8 m/s when it explodes into three pieces A, B and C. A(20 kg) flies along at 20 m/s along the line of flight and B(16 kg) flies at 15 m/s at 45 degrees to the line of flight in the forward direction. Find the velocity of mass C in magnitude and direction and estimate the energy supplied in the explosion.
A 210 kg mass initially at rest on a smooth horizontal plane is acted upon by a force F parallel with the plane. If F is 1.4 tN where t is time in seconds, find for an interval of 30 seconds from rest: (a) the impulse (b) the velocity (c) the average force producing the same impulse.
A shunting locomotive provides impulse of 40kN to set motion a stationary 8 tones wagon which then moves off freely at velocity u against a track resistance of 60N/tone and finally reaches a velocity v after 20 seconds. Find the values of u and v.
A 2 tone car is towed by a 2.5 tone truck which moves from rest and reaches a speed o 2m/s before tightens on the stationary car. The rope then stretches taking up the strain fro 0.15 seconds, find the common speed when the rope ceases to stretch
A 40 tonnes rail car travels at 4km/h collides with a 100 tonnes wagon moving on the same track in the opposite direction at 1.2 km/h. Find their velocities immediately after impact assuming no loss of energy.
a 2 tonne car is towed by a 2.5 tonne truck which moves off from rest and reaches a speed of 2m/s before the rope tightens on the stationary car. the rope then stretches taking up the strain for 0.15 seconds. find the common speed when the rope ceases to stretch