Length of the year is equivalent to the time it takes for one

The force acting on a beam was measured under the same operating conditions and a sample of 5 data points was collected. this process was repeated by 3 observers. the pooled standard deviations of these 3 data sets was 1.21. determine the true mean force using all pooled data (with a 95% probability). the result should look like this: true mean = mean +/- margin of error

What is the final velocity of the initial velocity of 25 and -50?

Need asap ‼️ 20 pts which gravitational force field diagram is drawn correctly? (answers in pictures below)