One Point Questions SIGNS AND UNITS COUNT! 1. A crate is sliding up an incline that is 40 above the horizontal. If the coefficient of kinetic friction is 0.25, the deceleration of the crate is: 2. A large cannon is fired over level ground at an angle of 25 above the horizontal. The muzzle velocity is 800 m/s. Neglecting air resistance, the projectile will travel what horizontal distance before striking the ground? 3. . A stone is tied to a 5.00 m string and whirled at a constant speed of 10.0 m/s in a vertical circle. Its radial acceleration in m/s2 at the top of the circle is (magnitude & direction) 4. A horizontal force of 5.0 N pushes a 2.50-kg block against a vertical wall. The block is initially at rest. If HK = 0.25 and us = 0.50, the acceleration of the block in m/s is: Push mg 5. Two titanium box approach each other head-on with the same speed and collide elastically. After the collision, one of the boxes, whose mass is 500 grams remains at rest. What is the mass of the other box? 1 2 6 Sand is dropped straight down on a moving conveyor belt at the rate of 5.00 kg/s. If friction in the bearings can be ignored the power that must be expended to keep the belt moving at 7.00 m/s is