Aball of weight 400 n is placed on a smooth inclined plane of inclination 30o. to a point p on its circumference an inextensible string is attached and tied to a point q on the plane. if the radius of the ball is 2m and pq = 2√3 m. determine: i. the value of the tension t in the string. ii. the normal reaction exerted by the ball on the plane.

Aferris wheel is a vertical, circular amusement ride with radius 9 m. riders sit on seats that swivel to remain horizontal. the ferris wheel rotates at a constant rate, going around once in 9 s. consider a rider whose mass is 56 kg. at the bottom of the ride, what is the perpendicular component of the rate of change of the rider's momentum? at the bottom of the ride, what is the vector force exerted by the seat on the rider?

One day, after pulling down your window shade, you notice that sunlight is passing through a pinhole in the shade and making a small patch of light on the far wall. you see that the patch of light seems to be a circular diffraction pattern. it appears that the central maximum is about 1 cm across and you estimate that the distance from the window shade to the wall is about 3 m. what is (a) the average wavelength of sunlight? (b) the diameter of the pinhole?

It is really hard for me right know