Other Physics Answers

Two forces whose resultant is 10N are perpendicular to each other. If one of them makes an angle of 60 with the resultant, calculate the magnitude

a from a balloon reaches the ground in 30 sec. Determine the height of the balloon if it at rest in the air

in a billiard table a ball of mass weighing 250 g rolls at a velocity of 2?5 m/s and rebounds back at 2.5 m/s what is it change in momentum

Which of the following statements is true for a projectile launched at an angle of 45 with the horizontal?

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.

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)

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.