Search & Filtering
An object is thrown vertically downwards with the speed 5m/s, while another object is thrown vertically upward with speed 10m/s, which object undergoes greater change in speed in a time of 2 second?
A satellite is located 2.75 * 10 ^ 5 m above the surface of the Earth. What is the period of the satellite's orbit?
A 4.0 kg ball is swung at a constant speed in a vertical circle of radius 2.5 m. If the ball completes one revolution in 3.0 s, what is the tension in the rope at the top of the circle?
1. What centripetal force is required to cause a 12.0 kg object to complete seven revolutions around a horizontal circle of radius 7.50 m in 24.0 s?
A car moving with constant acceleration covers the distance between two points 60 m apart in 6 sec. It speed as its pass the second point is 15 m/s. what is its speed at the first point?
8. A ball of mass 0.200 kg has a velocity of 150m/s; a ball of mass 0.300 kg has a
velocity of -0.4m/s. They meet in a head-on elastic collision. (a) Find their velocities
after the collision. (b) Find the velocity of their center of mass before and after the
collision.
7. A bag of cement of weight 1000 N hangs from three
ropes as shown in the figure below. Two of the ropes
make angles of θ1=60o
and θ2=30o with the
horizontal. If the system is in equilibrium, find the
tensions T1, T2 and T3 in the ropes.
6. An automobile whose speed is increasing at a rate of 0.6 m/s2
travels along a circular road of
radius 20 m. When the instantaneous speed of the automobile is 4 m/s, find (a) the tangential
acceleration component, (b) the centripetal acceleration component
4. An electron in a cathode ray tube (CRT) accelerates from 2x104
m/s to 6x106
m/s over 1.50 cm.
(a) How long does the electron take to travel this 1.5 cm?
(b) What is its acceleration
. A particle undergoes three consecutive displacements: d1 = (15 j+ 30 j+ 12 k) cm,
d2 = (23 i - 14 i -5.0 k) cm and d3 = (-13i + 15 j) cm
