Engineering Mechanics - Kinematics of Particle (KOP)
Exercise : Kinematics of Particle (KOP) - General Questions
- Kinematics of Particle (KOP) - General Questions
31.
The boy throws a snowball such that it strikes the wall of the building at the maximum height of its trajectory. If it takes t = 1.5 s to travel from A to B, determine the velocity vA at which it was thrown, the angle of release 
, and the height h.
vA = 12.00 ft/s, = 24.4E, h = 21.7 ft
= 24.4E, h = 21.7 ftvA = 49.8 ft/s, = 76.0E, h = 39.7 ft
= 76.0E, h = 39.7 ftvA = 36.3 ft/s, = 24.4E, h = 18.2 ft
= 24.4E, h = 18.2 ftvA = 48.3 ft/s, = 65.6E, h = 39.7 ft
= 65.6E, h = 39.7 ft32.
For a short time the missile moves along the parabolic path y = (18 - 2x2) km. If motion along the ground is measured as x = (4t - 3) km, where t is in seconds, determine the magnitudes of the missile's velocity and acceleration when t = 1 s.
33.
A small metal particle passes downward through a fluid medium while being subjected to the attraction of a magnetic field such that its position is observed to be s = (15t3 - 3t) mm, where t is measured in seconds. Determine (a) the particle's displacement from t = 2 s to t = 4 s, and (b) the velocity and acceleration of the particle when t = 5 s.
s = 834 mm, v = 1122 mm/s, a = 450 mm/s2 s = 114 mm, v = 1122 mm/s, a = 450 mm/s2 s = 114 mm, v = 450 mm/s, a = 1122 mm/s2 s = 834 mm, v = 450 mm/s, a = 1122 mm/s234.
A car is traveling at a speed of 80 ft/s when the brakes are suddenly applied, causing a constant deceleration of 10 ft/s2. Determine the time required to stop the car and the distance traveled before stopping.
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