Q1. the magnitude of dot and cross product of two vectors is (6sqrt3) and (6) respectively. find the angle between the vectors.
Q2. a tractor of weight 15,000 N crosses a single span bridge of weight 8000N and of length 21m. the bridge span is supported half a meter from either end. the tractor's front wheels take 1/3 of the total weight of the tractor, and the rear wheels are 3m behind the front wheels. calculate the force on the bridge supports when the rear wheels are at the middle of the bridge span.
Q3. a spherical ball of weight 50 N is to be lifted over the step 5 cm high. the ball has radius 10cm front he flatter side and 20 cm from the round one (since it is a sphere). calculate the minimum force needed to just lift it above the floor.
Q4. a uniform sphere of weight 10 N is held by a string attached to a frictionless wall so that the string makes an angle 30 degree with the wall. find the tension in the string and the force exerted on the sphere by the wall.
please please please answer these! thanks in advance
Q2. a tractor of weight 15,000 N crosses a single span bridge of weight 8000N and of length 21m. the bridge span is supported half a meter from either end. the tractor's front wheels take 1/3 of the total weight of the tractor, and the rear wheels are 3m behind the front wheels. calculate the force on the bridge supports when the rear wheels are at the middle of the bridge span.
Q3. a spherical ball of weight 50 N is to be lifted over the step 5 cm high. the ball has radius 10cm front he flatter side and 20 cm from the round one (since it is a sphere). calculate the minimum force needed to just lift it above the floor.
Q4. a uniform sphere of weight 10 N is held by a string attached to a frictionless wall so that the string makes an angle 30 degree with the wall. find the tension in the string and the force exerted on the sphere by the wall.
please please please answer these! thanks in advance