Q1. A beam of 6 MeV electrons passes through a 400 micro-meter thick silicon detector. Estimate the energy lost by the electrons when crossing 200 micro-meters, 300 micro-meters and the full thickness of the detector.

Q2. A 5.1 g bullet leaves the muzzle of a rifle with a speed of 328 m/s. What force (assumed constant) is exerted on the bullet as it is travelling down the 0.85 m long barrel of the rifle?

Q3. A skier of mass 67 kg is pulled up a slope by a motor-driven cable.

(a) How much work is required to pull him 90 m up a 60° slope (assumed frictionless) at a constant speed of 1.9 m/s?

(b) How what HP moted would be necessary.

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