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Black_prince [1.1K]

3 years ago

9

Fredrick did an investigation on mass and acceleration. He applied a force to a toy car and measured the distance it moved. He t

hen taped weights of different masses to the car and applied the same force. He entered his observations in a table.
Fredrick’s Investigation
Mass Distance
car 250 grams 4.2 meters
car + 50 grams 300 grams 3.8 meters
car + 100 grams 350 grams 3.0 meters

Which statement correctly interprets the data?
A. Mass has no effect on acceleration.
B. More mass results in less acceleration.
C. More force results in greater acceleration.
D. More mass results in greater acceleration.

1 answer:

garik1379 [7]3 years ago

6 0

Explanation:

B. More mass results in less acceleration.

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A war wolf is a device used during the middle ages to assault fortifications with large rocks. A simple trebuchet is constructed

Katarina [22]

Answer:v=41.23 m/s

Explanation:

Given

mass of heavy object $m_1=52 kg$

distance of $m_1$ from the axle $r_1=14 cm$

mass of rock $m_2=123 gm$

Length of rod $=4.1 m$

distance of $m_2$ from axle $r_2=4.1-0.14=3.96 m$

Net torque acting is

$T_{net}=m_1gr_1-m_2gr_2$

$T_{net}=52\times 0.14\times g-0.123\times 3.96\times g$

$T_{net}=6.793\times 9.8$

$T_{net}=66.57 N-m$

Work done by $T_{net}$ is converted to rock kinetic Energy

thus

$T_{net}\times \theta =\frac{mv^2}{2}$

Where $\theta =angle\ turned =\frac{\pi }{2}$

$v= velocity\ at\ launch$

$66.57\times \frac{\pi }{2}=\frac{0.123\times v^2}{2}$

$v^2=66.57\times \pi$

$v=\sqrt{1700.511}$

$v=41.23 m/s$

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3 years ago