Search & Filtering
You and your friend throw balloons filled with water from the roof of a several story apartment house. You simply drop a balloon from rest. A second balloon is thrown downward by your friend 2.8 s later with an initial speed of 54.88 m/s. They hit the ground simultaneously. How high is the apartment house? The acceleration of gravity is 9.8 m/s 2 . Neglect air resistance. Answer in units of m.
A robot fires a gun pointed horizontally at a target 149m away. The bullet hits the target 97mm lower. Determine the speed of the bullet when it leaves the gun. Assume there is no air resistance.
(a) What is the maximum speed Vmax of the mass?
(b) What is the maximum acceleration amax?
smooth pulley of radius 20 cm. The moment of inertia of the pulley is 2 kg m2
.
(i) Sketch the free body diagram of the 1.5 kg block.
(ii) When the mass is released from rest, calculate the angular velocity and number of
revolutions of the pulley at t = 4.2 s.
resting on a rough floor with a minimum inclination angle à ¸min. The coefficient of
friction between the ladder and floor is 0.25.
(i) With the aid of a force diagram, calculate the forces acting on the ladder at
point P and point Q.
(ii) Determine the value of à ¸min.
A Juggler throws a red ball vertically upwards at speed 33m/s. The juggler throws a green ball at an unknown speed 1.8 seconds before the red ball reaches its maximum height. The green ball passes the red ball when the red ball is at its maximum height. Assuming both the balls are thrown from the same level. Determine the initial speed of the green ball.
mathematical relation for the same and discuss its behaviour at very high and at very low
temperatures and compare its prediction with actual results.
