h = 25/2.45 = 10.2 m. 22. A block of mass m = 5.00 kg is released from point A and slides on the frictionless track shown in the figure below. Determine (a) the block’s speed at points B and C (b) the net work done by the gravitational force on the block as it moves from point A to point C (a)B. ½ mvB2 + mghB = ½ mvA2 + mghA. ½ vB2 + ghB ... A boat B is moving with constant velocity. At noon, B is at the point with position vector (3i 4j) km with respect to a fixed origin O. At 1430 on the same day, B is at the point with position vector (8i + 11 j) km. (a) Find the velocity of B, giving your answer in the form pi + qj. (3) At time t hours after noon, the position vector of B is b km.

The force exerted by gravity on 1 kg = —10 N. The force exerted by gravity on 5 kg = The force exerted by gravity on 70 kg = The value of the British systemic 32 ft/cec2 The unit of force is pounds. The unit of mass the slug- your pounds to W = (501b) calculate your masc in units of slugs. PSYW q,G875 32 50

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