Two particles P and Q move towards each other along a straight line MN, 51 meters long. P starts from M with velocity 5ms-1 and constant acceleration of 1ms-2. Q starts from N at the same time with velocity 6ms-1 and at a constant acceleration of 3ms-2.
Find the time when the :
A) particles are 30m apart
C) velocity of P is ¾ of the velocity of Q
• A 50.0 kg circus acrobat drops from a height of 2.0 m straight down onto a springboard with a force constant of 8.00 × 103 N/m. By what maximum distance does she compress the spring?
• Using energy considerations and assuming negligible air resistance, show that a rock thrown from a bridge 20.0 m above water with an initial speed of 15.0 m/s strikes the water with a speed of 24.8 m/s independent of the direction thrown.