Week 7 Lesson 2 | Science - Quizizz

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Week 7 Lesson 2

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Slide 1
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Week 7 Lesson 2
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Slide 2
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Slide 3
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watch the video and prepare for the Questions to follow
Subtitle
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Question 5
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Q.
What is the formula to calculate speed ?
no correct answer

alternatives
answer explanation
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Slide 7
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Question 8
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Q.
Which Formula should be used to Calculate his speed?
answer choices
S=D/T
W=m x g
F=m x a
<p>S=D/T</p>
alternatives
<p>W=m x g</p>
<p>F=m x a</p>
answer explanation
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Question 9
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Q.
Note, convert time into seconds when needed

Using the formula Speed=Distance/Time. Calculate the speed of the following: A freefall jumper jumps out of a building, he is 90 meters above the ground, he takes 3 minute to reach the ground. Use the formula to calculate his speed. Remember to convert certain values when calculating.

Which answer has the formula ,values converted and answered correctly ?
answer choices
S=D/T: 90m/3minute = 30m.s, the diver’s speed is 30m.s
S=D/T: 30m/120s= 0.25m.s, the diver’s speed is 0.25m.s
S=D/T: 90m/180s=0.5m. s, the diver’s speed is 0.5m.s
The diver’s speed is 100m.s
<p><span style="color: rgb(93, 226, 165);">S=D/T: 90m/3minute = 30m.s, the diver’s speed is 30m.s</span></p>
alternatives
<p><span style="color: rgb(73, 144, 226);">S=D/T: 30m/120s= 0.25m.s, the diver’s speed is 0.25m.s</span></p>
<p><strong style="color: rgb(241, 77, 118);">S=D/T: 90m/180s=0.5m. s, the diver’s speed is 0.5m.s</strong></p>
<p>The diver’s speed is 100m.s</p>
answer explanation
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Slide 10
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Question 11
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Q.
The Gravitational Force on the moon is the same as on Earth
answer choices
False
True
<p>False</p>
alternatives
<p>True</p>
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Slide 12
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Question 13
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Q.
If you have a mass of 56kg on earth , what will your mass be on the the moon ?
answer choices
23kg
56kg
65kg
depends on the gravitational forces
<p><span style="color: rgb(93, 226, 165);">23kg</span></p>
alternatives
<p><span style="color: rgb(93, 226, 165);">56kg</span></p>
<p><span style="color: rgb(93, 226, 165);">65kg</span></p>
<p><span style="color: rgb(241, 77, 118);">depends on the gravitational forces</span></p>
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Slide 14
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Question 15
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Q.
Using the formula W=m x g ( gravity is 10m/s2 on earth), Calculate the weight of a 50kg object on earth? choose the correct answer
answer choices
W=m x g : 50kg x 10m/s2=500N
W=m /g: 50kg /10m/s2=5N
W=m x g 50kg x 10m/s2=50N
<p><span style="color: rgb(241, 77, 118);">W=m x g : 50kg x 10m/s2=500N</span></p>
alternatives
<p>W=m /g: 50kg /10m/s2=5N</p>
<p><span style="color: rgb(73, 144, 226);">W=m x g 50kg x 10m/s2=50N</span></p>
answer explanation
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Slide 16
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Question 17
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Q.
In the formula P=W / T, Time has an SI unit in seconds (s)
answer choices
False
True
<p>False</p>
alternatives
<p>True</p>
answer explanation
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Slide 18
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Question 19
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Q.
Note, convert time into seconds when needed

Power=work/time: A small motor in a car does 24000J of work in 4minutes. What is the power of the motor in watts? (use the formula Power=work/time remember to convert certain values where needed) (choose the correct calculation below)
answer choices
P=W/T: 24000j/4minutes= 6000w (the motor has 6000 watts of power)
P=W/T: 24000j/240s= 100w (the motor has 100 watts of power)
P=W/T: 24000j/120s= 200w (the motor has 200 watts of power)
<p><span style="color: rgb(93, 226, 165);">P=W/T: 24000j/4minutes= 6000w (the motor has 6000 watts of power)</span></p>
alternatives
<p><span style="color: rgb(93, 226, 165);">P=W/T: 24000j/240s= 100w (the motor has 100 watts of power)</span></p>
<p><span style="color: rgb(93, 226, 165);">P=W/T: 24000j/120s= 200w (the motor has 200 watts of power)</span></p>
answer explanation
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Question 21
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Q.
This material would cause a shadow to form on the other side if a light was to shine on it
answer choices
Transparent
Translucent
opaque
<p>Transparent</p>
alternatives
<p>Translucent</p>
<p>opaque</p>
answer explanation
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Question 22
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Q.
What did you find easy from this lesson and what do you want to have further explained ?
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Slide 23
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Question 24
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Q.
From the previous slide which material would be best to replace the window ?
answer choices
Translucent
Transparent
opaque
<p>Translucent</p>
alternatives
<p>Transparent</p>
<p>opaque</p>
answer explanation
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