SCIENCE: Understanding Force + Motion + Gravity

THIS IS A QUIZ - IT IS NOT A TEST

Please think before answering each question, then skip any you don't understand.

On completing the quiz, you will receive an email (If you have supplied a
group), to find the correct solution to each incorrect or missing answer.

http://wps.flipster.org/doku.php?id=flipsters:forces:quiz:home

If you have any questions leave a wiki comment, ask classmates or a teacher.

Have fun :)

Adapted from: Science Education Assessment Resources (SEAR)

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Q1. Two EQUAL WEIGHTS are attached to each end of a rope on a PULLEY. What will happen when the boy & the girl both let go of the weights at the same time:

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Q2. A golfer hits a ball - After the golfer has HIT the ball and ignoring any wind and air resistance, what FORCES are acting on the ball AT EACH POINT (A, B, C) as it flies through the air (along the dotted line):

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Sam changed the NUMBER OF BOOKS under the end of the ramp to change the height and angle of the ramp. The car travelled DIFFERENT DISTANCES. He measured these distances and wrote them down: The number of books and the distance rolled by the car was entered in this table:

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Q4. Sam rolled two toy cars down a ramp onto a smooth, polished wooden floor: The BLUE car was TWICE AS HEAVY as the RED car. How far did the BLUE car travel?

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Q5. Sam noticed that when the ramp was placed on a CARPET or a POLISHED WOODEN floor the car rolled DIFFERENT DISTANCES. He measured how far the car went in each case & wrote the numbers down, but he forgot which measurement was for the carpet and which was for the polished floor. The measurements he wrote down were 31cm and 22cm

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Q6. Reminder: FORCE is a push or a pull. Sam throws a ball into the air. As it travels through the air, what is the DIRECTION OF FORCE ON THE BALL as it passes point A, point B and point C (as shown on the dotted line):

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Q7. Two men (A, B) are pushing IDENTICAL types of cars up a hill. The velocity, wind drag and friction are IDENTICAL for each car, which man is using the MOST FORCE:

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Q8. Diagrams (a, b, c, d, e, f) are how six different children drew what they thought would happen if a rock was dropped into a hole through the Earth: Ignoring heat and air pressure, which drawing SHOWS BEST what would really happen to the rock?

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Q9.

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Q10. In the solar system below, there is a sun and three planets (a, b, c). The three planets are identical except they have different sizes and are different distances from the sun. An identical rocket ship is ready to leave each planet:

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Q11. Five children drew how they thought about PEOPLE STANDING on the Earth and RAIN FALLING on the Earth. Which drawing SHOWS BEST what it is really like:

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Q15. Reminder: A force is a push or a pull. A bicycle brake uses a lever and cable to cause two rubber blocks to clamp onto the side of the wheel. The bicycle rider applies a force on the brake lever to make the system work.

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Q16. A group of students set up three separate tests for a remote-controlled toy car. For each test, the car has to travel over the same distance on three different surfaces: BITUMEN, ICE & WET GRASS. The car approaches each test surface at a fixed, steady speed. When the car reaches the start of the test surface, the students push the remote control speed lever to maximum, making the car drive wheels spin very fast.

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Q17. Sally moves a book across a table top at a constant, steady speed. Sally only pushes the book side-ways using her thumbs (she does not push down on the top of the book)

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Q18. Boris and Doris are chicken dance partners. Looking only at the photograph, which chicken do you think has the greater mass:

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