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# 2020 WAEC PHYSICS PRACTICAL QUESTIONS/ANSWERS VERIFIED EXPO

##### Graph!.

(1)

S|N; 1|2|3|4|5|

M(g); 40.0|60.0|80.0|100.0|120.0|

X(cm);37.50|25.01|8.75|15.00|12.50|

X-¹(cm-¹); 0.027| 0.040|0.|053|0.067|0.08|

X-¹(x10-³); 27.00|40.00|53.00|67.00|80.00|

G=50.0cm

Y=30.0cm

Slope =∆M/∆X^-1= M2-M1/(X^-1) – (X^-1)

S= 120.0 -40/80.0-27

S= 80/53

S=1.509*10^3

S=1509

(x)

S=ymo

1509=30mo

mo=1509/30

mo=50.3

(1xi)

(ii)Avoid error due to parallax

(1bii)

CWM = ACWM

60*25 = x *30

30x = 1500

Divide through by 30

30x/30 = 1500/30

x=50g

The mass that should be placed at the 80cm mark of the meter rule to balance it horizontally is 50g

(1bi)

Moment of a force can be defined as the product of the force and its perpendicular distance from its point of action.

##### (ii)The thickness of the resistor.

Posted by on 18th August 2020.

Categories: WAEC

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## 3 Responses

1. salis

by hy on Aug 19, 2020

2. Nweke pascal

by Will I get answers before 8:30 on Aug 20, 2020

3. yes 100% sure

by admin on Aug 20, 2020