Practice Test 3 – Mechanical Concepts Welcome to your Practice Test 3 - Mechanical Concepts Name Email 1. Two motors are used to pull crates of gold bars up a hill. Which hillside (A or B) will be easier to pull on? Hillside A Hillside B Hillsides are equal None 2. A weight can be lifted by one pulley or by four pulleys. Which will require the least pulling force? Pulley A Pulley B Pulleys are equal None 3. Four cogs rotate together. Cog 1 spins clockwise. A cog is added. In the new set of five cogs will Cog 2 spin clockwise (A), counterclockwise (B), or not at all (C)? Clockwise Counterclockwise Will not spin at all None 4. Two identical blocks of clay are suspended from the ceiling by strings. They are raised to different heights and dropped towards each other. After they hit and stick together, where will the new mass of clay go? Left (A), right (B), or nowhere (C). Left Right Nowhere None 5. Water flows through a funnel. With reference to the large end, will the small end have greater water speed (A), lower water speed(B), or the same water speed (C)? Greater water speed Lower water speed Same water speed None 6. Two identical blocks are on the same hill slope. One block is on smooth ice. If released from the same height on the slope, which block will reach the bottom first? (If equal, mark C) Block A Block B Blocks will reach the bottom at equal times None 7. Two identical gas tanks have oxygen inside. One has twice the mass of oxygen than the other. Does the one with less mass have more pressure (A), less pressure (B), or the same pressure as the other (C)? More pressure Less pressure Same pressure None 8. In this set of belts and pulleys, which pulley is rotating with the lowest number of revolutions per minute? Pulley A Pulley B Pulley C None 9. A farmer wants to put a heavy barrel in front of his gate to keep it shut. Which location will keep the gate closed best? Location A Location B Location C None 10. A soccer player kicks a ball up into the air from the ground. Ignoring air resistance, when the ball hits the ground, will it be going slower (A), faster (B), or the same speed as when it was kicked (C)? Slower Faster Same Speed None 11. Two men are trying to lift identical rocks with levers. Will the man with the longer lever need to push with a larger force (A), a smaller force (B), or the same force (C) as the man with the short lever to lift the rock? Larger force Smaller force Same force as the man with the short lever None 12. Which switch should be closed to turn on the light? Switch A Switch B Switch C None 13. Two boats support a bridge. When the truck is closer to one side than another, which boat supports the most weight? Boat A Boat B Boats support equal weight None 14. Two machetes are used to clear tall grass. Which machete will allow for the fastest cutting? Machete A Machete B Machetes are equal None 15. Will adding salt to water make objects in the water more likely to float (A) or less likely to float (B)? More likely to float Less likely to float Equal likelihood to float None 16. Will adding water to a water tower increase (A), decrease (B), or not affect (C) the water pressure at the bottom of the water tower? Increase water pressure Decrease water pressure Not affect the water pressure None 17. A man wants to cool down by getting into the river. Which location will cool him down more quickly? Location A Location B Location C None 18. Milk is measured in a liquid measuring cup. Which orientation will allow for the most accurate reading of the volume of milk? Orientation A Orientation B Orientation C None 19. Two vehicles weigh the same. Which is more likely to tip on a corner? Car A Car B Cars have equal likelihood to tip None 20. A bucket has a clear tube on the outside which connects at the bottom. How high will the fluid in the tube go? Height A Height B Height C None 21. Two identical balls are pushed vertically into identical springs. After the balls are released, which ball will reach the greatest height? Ball A Ball B Balls reach equal heights None 22. A fan spins with a certain rotational speed. Which part of the fan blade will travel the fastest through the air? Part A Part B Part C None 23. Two bags of sand are poured into identical tanks of water. Which tank will have the highest water level? Tank A Tank B Tanks will have equal water level None 24. Two identical balls with identical speeds bounce off each other. Which path is ball 1 likely to follow? Path A Path B Path C None 25. A pendulum is released at the shown height. It travels to point B. After the pendulum swings back and forth four times, how high is the pendulum likely to reach? Height A Height B Height C None 26. A sack of concrete is on a board. If the man lifts the board on the end to raise the concrete, where should the concrete be located to minimize the required force? Location A Location B Location C None 27. Two bowling balls are dropped onto identical springs. One bowling ball is dropped from 5 feet. The other is dropped from 10 feet. Which spring will compress more? Spring A Spring B Springs will compress equal amounts None 28. A toddler pulls the toilet paper off a toilet paper roll with a constant speed. Will the roll spin faster when the roll is large or when the roll is small? Smaller Larger Rolls will spin equally None 29. Water flows down a pipe with one size. Where will the water travel fastest? Location A Location B Locations allow equal water flow None 30. A bowling ball and a baseball are dropped from the same height onto separate platforms. Where should the second platform be placed so that the bowling ball and baseball land at the same time? Location A Location B Location C None 31. A boy spins a ball with a string. If he suddenly releases the string, which direction will the ball travel? Direction A Direction B Direction C None 32. An antique bicycle has one large wheel and one small wheel. When the bicycle is moving forward, which wheel rotates faster or do they rotate at the same speed? Wheel A Wheel B Wheels rotate equal speeds None 33. A cart has a bucket of water resting on it. If the cart going to go around a right corner quickly, which way should the road tilt to keep the bucket as stable as possible? A B C None 34. Two cars go along the track. Which car travels the greatest distance? Car A Car B Cars travel equal distance None 35. Six identical cogs spin each other. If the first is spinning clockwise, which cog is also spinning clockwise? Cog A Cog B Cog C None 36. Twin goats push each other with their horns. One goat is standing on ice (left), but the other is on dirt (right). Which goat will succeed in pushing the other goat back? Goat A Goat B Goats will push back equally None 37. A man tries to brace a falling wall. In which position is it best for the man to push? Position A Position B Position C None 38. Which switch, if opened, guarantees that all the lights in the circuit are turned off? Switch A Switch B Switch C None 39. Two bowling balls are the same size, but ball B weighs more than ball A. Which ball is more likely to float in a tank of fluid? Ball A Ball B Balls have equal likelihood to float None 40. Which arrangement of boxes on the cart is more likely to result in tipping? Arrangement A Arrangement B Arrangements have equal likelihood of tipping None 41. Two identical valves have differently sized handwheels. Which handwheel will require the least amount of force to use? Handwheel A Handwheel B Handwheels require equal forces None 42. Two weights, one forty lb weight and one eighty lb weight, are dropped from a height of four feet over the ground. Which weight will hit the ground with more force? Weight A Weight B Weights will hit the ground equally None 43. A boat is driving in circles. A man on the boat jumps straight up. Where will the man tend to go? Path A Path B Path C None 44. A baseball player swings his bat at a specific rotational speed. Where should the ball hit to rebound with the highest speed? Point A Point B Point C None 1 out of 44 Time's up
