An elevator cab with mass 1200 kg moves downward. What is the tension in the cable if the cab’s speed is decreasing at a rate 2.2 m/s2?
A physics textbook is placed on a spring scale in an elevato…
A physics textbook is placed on a spring scale in an elevator. Of the following, the scale shows the highest reading when the elevator:
A car is moving along a straight line with a velocity v. App…
A car is moving along a straight line with a velocity v. Applying the brake causes a constant negative acceleration which stops it in 5 s within a distance 75 m. What is the magnitude of the acceleration in m/s2?
A boy pulls a box along a rough horizontal floor at constant…
A boy pulls a box along a rough horizontal floor at constant speed by means of a force of magnitude F which is directed at an angle
A block of mass m is pulled along a horizontal (frictionless…
A block of mass m is pulled along a horizontal (frictionless) floor by an applied force F as shown at an angle
A football is kicked with a velocity v0-at an angle
A football is kicked with a velocity v0-at an angle
A horizontal force of magnitude F pushes a block of weight 3…
A horizontal force of magnitude F pushes a block of weight 3 N against a rough vertical wall. The coefficient of static friction between the wall and the block is 0.50. What is the smallest value of F for which the block does not slide?
A block is moving at a constant speed of +2 m/s in the posit…
A block is moving at a constant speed of +2 m/s in the positive x-direction, and has three forces acting on it, F1, F2 and F3. F1 = +6 N, F2 = -2 N (the + and – signs refer to the positive and negative x-directions respectively throughout the question). What is F3?
A ball is thrown from a height 5 m above a point on the grou…
A ball is thrown from a height 5 m above a point on the ground with an initial velocity 12 m/s at an angle 600 above the horizontal. The ball was caught at a horizontal distance 15 m the starting point. How high above the ground was the ball caught?
Starting at rest at a location x=0, a body of mass 3 kg has…
Starting at rest at a location x=0, a body of mass 3 kg has an external force in the x-direction applied to it, given by F(x) =x2+x, with F in N and x in meters. How much work (in J) is done by the force as the mass moves a distance of 6 meters?