body placed on a rough horizontal level \( W=75 \mathrm{~N} \) horizontal force affected 50 N Makes it about to move en the coefficient of friction equals \( \begin{array}{llll}\text { 1) } \frac{1}{3} & \text { 2) } \frac{2}{3} & \text { 3) } \frac{3}{4} & \text { 4) } \frac{1}{4}\end{array} \)

22.Sebuah benda bermuatan \( \mathrm{q}=9 \times 10^{-5} \mathrm{C} \) dan mempunyai gaya elektrolisis \( 7,2 \mathrm{~N} \). maka kuat medan pada tempat benda tersebut berada adalah.. A. \( 1,2 \times 10^{-6} \mathrm{~N} / \mathrm{C} \) B. \( 4,2 \times 10^{-6} \mathrm{~N} / \mathrm{C} \) C. \( 5,0 \times 10^{-6} \mathrm{~N} / \mathrm{C} \) D. \( 8,0 \times 10^{-6} \mathrm{~N} / \mathrm{C} \)

Sloths are known for being slow. An average tree sloth moves at a speed of \( 0.743 \mathrm{~m} / \mathrm{s} \). T the nearest second, how long does it take a sloth to travel 22.3 m at this speed?

f Steve throws the football 50 meters in 3 seconds, what is the average speed of the football? (nearest hundredth) If it takes Ashley 3 seconds to run from the batters box to first base at an average spe of 6.5 meters per second, what is the distance she covers in that time? \( \begin{array}{l}\text { Bart ran } 5000 \text { meters from the cops and an average speed of } 8 \text { meters/second before } \\ \text { he got caught. How long did he run? }\end{array} \)

What is the dot product of vector \( j \) with a magnitude of 4 and a direction of \( 30^{\circ} \) and vector k with a magnitude of 10 and a direction of \( 15^{\circ} \) ? (Round your answer to the nearest tenth.)

1. A 0.500 g (small) mass on the end of a 1.70 m long string is pulled aside \( 20^{\circ} \) from the vertical and shoved downward (toward the bottom of its motion) with a speed of \( 2.4 \mathrm{~m} / \mathrm{s} \). (a) Is the angle on the other side greater than, less than, or the same as the angle on the initial side \( \left(20^{\circ}\right) \) ? Explain in terms of energy. (5pts) (b) Calculate the angle it goes to on the other side, neglecting air resistance. ( 10 pts )