A bowling ball is moving down a flat bowling lane at a constant speed. Which statements best describe the movement of this bowling ball? Select all that apply. A. Its movement is caused by unbalanced forces. B. Its movement changes without a force acting upon it. C. Its movement shows Newton's first law of motion. D. Its movement shows Newton's third law of motion. E. Its movement shows Newton's second law of motion. F. Its movement remains the same unless a force acts upon it.

Problem (2) \( A \) iniform ladder \( A B \) of weight 10 kg .w and 3 m length rests with its end \( A \) on a smooth horizomal noor and is end B on a smooth vertical wall. the ladder is kept in equilibritum by a rope tied to on of irs ends A. and irs other end is attached to a point on the hori=ontal plane vertically below B. if the ladder is inclined at \( +5^{\circ} \) to the horizontal, a man of weight 60 kg . w was ascending the ladder find the magnitude of the tension in the rope when the man is \( 2 m \) away from \( A \) \( \qquad \) \( \qquad \)

14. A train moving at an average speed of \( 72 \mathrm{~km} / \mathrm{h} \) takes 15 seconds to completely cross a bridge that is 80 metres long (a) Express \( 72 \mathrm{~km} / \mathrm{h} \) in metres per second (b) Find the length of the train in metres ( 2 mk )

La cantidad de un material radiactivo disminuye a la mitad cada 10 años. Si comenzamos con 80 gramos, ¿cuánto quedará después de 30 años?

A boat is supposed to travel with a velocity vector of \( \langle 40,30\rangle \), but the current has a velocity vector of \( \langle 0,-5\rangle \). What is the boat's actual velocity vector? \( \langle 45,30\rangle \) \( \langle 40,25\rangle \) \( \langle 40,35\rangle \)

An object of mass 0.1 kg , which is fastened at one end of a cord of length L , is whirled about a vertical circle. The tangential speed of the object when the cord makes \( 53^{\circ} \) with the vertical and moving down is \( 5 \mathrm{~m} / \mathrm{s} \) and the tension in the cord at this time is \( \mathrm{T}_{1}=\mathrm{T} \). When the angle is reduced to \( 37^{\circ} \), the speed becomes \( 8 \mathrm{~m} / \mathrm{s} \) and the tension through the cord doubles. Find the length \( L \) and the tension T .