Question

12. A crate is pulled across a horizontal floor by a rope tied to the crate. The rope makes an angle of 37 degrees with the horizontal. Find the frictional force if the tension in the rope is 10N and the crate moves with constant velocity. a. 3.0 N b. 5.0 N c. 7.0 N d. 8.0 N e. None of them 13. A 1500 kg car travels at a speed of 20 m/s. What is its kinetic energy? a. 15.0 x 105) b. 2.5 X 105 C. 3.0 x 105) d. 6.0 x 105)

Answer 1

12) o body can move with constant velocity only when there is no anbalanced torce acts on it. So, there in this case we can write - Horinontal component of force a frictional force losin 377 TION 1979 >10 cos ng 20 10 cos 37° - Frictional force Frictional force = 8.ON [Ans option (87 13) kinetic energy - xmxu2 = tx 1500x (20)? J - 3x105J (Ans option (en

12) o body can move with constant velocity only when there is no anbalanced torce acts on it. So, there in this case we can write - Horinontal component of force a frictional force losin 377 TION 1979 >10 cos ng 20 10 cos 37° - Frictional force Frictional force = 8.ON [Ans option (87 13) kinetic energy - xmxu2 = tx 1500x (20)? J - 3x105J (Ans option (en
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