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If a current of 500 mA charges a dielectric for 3 s, how much charge is stored in the dielectric ?
The velocity of a train is reduced uniformly from 40km sec to 30kmsec while travelling a distance of 100km.
a=calculate the retardation
b=how much farther will it travel before coming to rest, assuming the same retardation.
When the air resistance is ignored, the horizontal range R of a projectile is given by R(8)= 9 sin 20 where is the constant initial velocity, g is the acceleration due to gravity, and is the angle of elevation or departure. Find the maximum range of projectile.
An aircraft shell is fired vertically upward with a muzzle velocity of 1000ms.calculate;
a=the maximum height it can attain
b=the time taken to reach this height
c=the instantaneous velocities at the ends of 20sec and 50sec
d=when will it's height be 37.5km.interprete your result. neglect air resistance.
A body at rest is given an initial uniform acceleration of 8.0ms for 30s after which the acceleration is reduced to 5.0ms for the next 20s.the body maintain the speed attained for 60s after which it is brought to rest in 20s draw the velocity time graph of the motion using this information given above a=maximum speed attained during the motion
b= average retardation as the body is being brought to rest.
Graph the relationship between the magnitude of centripetal acceleration and (a) the speed of an object in a uniform circular motion (with a constant radius) (b) the radius of a circle (at a constant speed) (c) the radius of rotation (at a constant frequency)
1. A volleyball player serves a ball with his height of 1.5-meter height and strikes the floor at point three meter horizontally.
a. Time of flight of the ball
b. Its horizontal velocity
4. A rope of negligible mass is stretched horizontally between two supports that are 3.44 m apart. When an
object of weight 3160 N hung at the center of the rope, the rope is observed to sag by 35.0 cm. What is
the tension in the rope?
A truck of mass 4,000 kg at a speed of 10 m/s due east collides head-on with a car of mass 1,200 kg at a speed 20 m/s due west. After the collision two vehicles are stuck together. What is the total momentum of these vehicles together in units of 104 kg m/s? If they go east (west), the momentum is positive (negative). Include the sign to indicate which direction they go after the collision (positive momentum value for east and negative value for west). If your answer is 20000 kg m/s (20x104 kg m/s) , you simply write 20 as your answer.
A car carrying a driver and a front-seat passenger of mass 60 kg initially is moving with a speed 18 m/s. The car is then slowed down to rest by an air bag in a time period of 0.4 s. Find the average force in N on the front-seat passenger during this time period. First calculate the impulse and then the average force. Do not use a comma to separate every three-digits.
