Car a runs a red light and broadsides car b, which is stopped and waiting to make a left turn. car a has a mass of 1,800 kg. car b has a mass of 1,500 kg. after the impact, the cars stick together and slide away at a speed of 7.1m/s. how fast was car a going when it hit car b

car a you need to add 1800 and 7.1m if it don work try to add car subtract   car b than add 7.1m

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards