Forces and Motion

Force & Motion Review

By Tencha Stone

Multiple Choice

Students investigate force. The masses they used begin at rest on the ramp. The setup he students use is shown. Which change will reduce the amount of force needed to move the masses?

• A. Decrease the height of the ramp

• B. Increase the height of the ramp

• C. Add an additional mass

• D. Pull the spring scale with two hands

Multiple Choice

A student conducts the investigation shown in the picture. In this experiment a paper cup hangs from a string tied to a single uncooked spaghetti noodle. The student then adds pennies to the paper cup one at a time. Which question is the student most likely trying to answer?

• A. how many noodles will it take to hold up the mass of a penny

• B. how much force will it take to break the noodle?

• C. how long should the string that holds the paper cup be in order to support the greatest amount of pennies?

• D. how does the distance between the 2 charis affect the amount of force it takes to break teh noodle?

Multiple Choice

Students design an experiment to determine how much force is needed t move blocks of wood of different masses slowly across a lab table. Which procedure should students include in their design?

• A. conduct 5 trials, using a different scale to pull each block of wood

• B. conduct 5 trials, pulling a different side of each block each time

• conduct 5 trials, using a different table for each trial

• D. conduct 5 trials, pulling each block of wood in the same way for each trial

Multiple Choice

The diagrams show 2 trials of an ment in which a spring scale was used to measure force. This experiment can be used to determine --

• A. how mass affects the force needed to move objects

• B. how force affects the mass of 2 objects

• C. how the force used to pull a dictionaly affects the mass of a box of marbles

• D. how the mass of a box of marbles affects the mass of a dictionary

Multiple Choice

Students drop the same heavy ball onto identical blockes of soft clay from different heights. For each height they measure the depth of the dent the ball makes in teh clay. Why is the depth of the dent different in each trial?

• A. the ball size changes

• B. the material of the bll changes

• C. the mass of the ball when it hits the clay changes

• D. the force of the ball when it hits the clay changes

Multiple Choice

A student designs an experiment to test the effet of the width of a piece of elastic on the elastic's ability to stretch. The student selects 4 pieces of elastic with different widths but the same length. The student then attaches blocks with different masses to the pieces of elastic. The results of the experiment are shown in teh picture. What should the student do to improve this experiment?

• A. use blocks of equal mass on the 4 pieces of elastic

• B. use blocks with enough mass to cause the 4 pieces of elastic to break

• C. use more than 4 pieces of elastic and 4 blocks

• D. use 4 pieces of elastic with different lengths but the same width

Multiple Choice

A student designs n experiment to test the force of a spring using a spring launcher and 4 spheres with the same diameter but different masses. What other piece of equipment would be most udeful for this experiment?

• A. a graduated cylinder to measure the volume of each sphere before it is launched

• B. a beaker to collect the spheres after they are launched

• C. a stopwatch to measure how long it takes to load each shpere on the spring

• D. a meterstick to measure the height each sphere reaches after the sphere is launched

Multiple Choice

A student uses a spring scale to pull a 50 gram block horizontally across a wood desk. Then the student pulls the block the same distance acoss carpet, sandpaper, and glass. Which question is hte investigation designed to answer?

• A. how do blocks of different sized react to force?

• B. how do different surfaces affect the amount of force needed to move a block?

• C. how do blocks affect spring scales?

• D. how does the mass of a block change when it is pulled across a desk?