Realizing although they repeat questions some how they always have something new to put on the paper. Really hope that most of the questions are repeated.
because weight and mass are different. his MASS was 70kg but his WEIGHT is 700N. weight is calculated by mass x gravity (earth’s gravity is always 10 m/s^2 during these calculations unless stated otherwise), so 70kg x 10 m/s^2 = 700N
That would be the answer if the 20 was in seconds or milliseconds. Remember the formula for frequency is f=1/T, where T is the period measured in seconds. However, the 20 was in cm which is not time/period so therefore it is unknown. Hope this helps👍
For #12, the answer seems to be c. I believe the height is constant and the experiment is dependent on the weight of the ball hence the mass is not negligible.
It not exactly the pendulum lab but the finding of Galileo Galilei when he proved that no matter the mass of on object falling at acceleration due to gravity the time they hit the ground will be the same if they were released at the same height at the same time .....hence mass has nth to do with it....plz research it of am wrong....
