youtube.com/watch?v=srDeACrSf-o&t=12s     In the video, I drop a ball off a three-story balcony. We know that objects in freefall follow the equation for height h, in meters, h=−4.9t2+ch=-4.9t2+c, where t is time in seconds, and c is the initial height. A student timed the drop at 1.51 seconds. Use this to determine the height from which the ball was dropped, to at least 2 decimal places.

The position of a squirrel running in a park is given by F=[(0.280 m/s)t + (0.0360 m/s²)t2] + (0.0190 m/s³)t³j. - Part D At t = 4.20 s, what is the magnitude of the squirrel's velocity? Express your answer with the appropriate units. V = Submit ▾ Part E Value 0 = HÅ Submit Request Answer Units At t = 4.20 s, what is the direction (in degrees counterclockwise from +x-axis) of the squirrel's velocity? Express your answer in degrees. [ΨΕΙ ΑΣΦ Request Answer 90 @ C ? B ?

In the Soapbox Derby in (Figure 1), young participants build non-motorized cars with very low-friction wheels. Cars race by rolling down a hill. Assume that the track begins with a 63-ft-long (1 m = 3.28 ft) section tilted 15 ∘ below horizontal.  Part A: What is the maximum possible acceleration of a car moving down this stretch of track? Express your answer to two significant figures and include the appropriate units. Part B:If a car starts from rest and undergoes this acceleration for the full l, what is its final speed in m/s ? Express your answer using two significant figures.

What is E and F?? Please help!