Part a- a block starts at rest and slides down a frictionless track. it leaves the track horizontally, flies through the air, and subsequently strikes the ground. the acceleration of gravity is 9.81 m/s 2. the mass of the block is 447g. the initial height of the track is 4m, while the final height of the track is 2.4m above the ground. what is the speed v of the ball when it leaves the track? answer in units of m/s. part b- what is the horizontal distance x the block travels in the air? answer in units of m. part c- what is the speed of the block when it hits the ground? answer in units of m/s.

Acommon technique in analysis of scientific data is normalization. the purpose of normalizing data is to eliminate irrelevant constants that can obscure the salient features of the data. the goal of this experiment is to test the hypothesis that the flux of light decreases as the square of the distance from the source. in this case, the absolute value of the voltage measured by the photometer is irrelevant; only the relative value conveys useful information. suppose that in part 2.2.2 of the experiment, students obtain a signal value of 162 mv at a distance of 4 cm and a value of 86 mv at a distance of 5.7 cm. normalize the students' data to the value obtained at 4 cm. (divide the signal value by 162.) then calculate the theoretically expected (normalized) value at 5.7 cm.