A cyclist and bicycle have a combined mass of 90 kg. Starting from rest, the cyclist rides down a 10 m high hill and up a 7 m high hill without pedaling the bicycle.
What is the potential energy of the cyclist and bicycle at the top of the 7 m hill with respect to the bottom of the 7 m hill?

Awoman holds a book by placing it between her hands such that she presses at right angles to the front and back covers. the book has a mass of m = 1.8 kg and the coefficient of static friction between her hand and the book is μs = 0.67. no attempt 50% part (a) what is the weight of the book, fgb in newtons?

How many neutrons does element x if it’s atomic number is 28 and its mass number is 87

The chart shows the costs and shipping times for materials that a company needs to build a new product. which describes the best trade-off if the company needs to start building their product within the next two years? they should order the domestic materials because it is always best to choose the fastest shipping time. they should order the imported materials because it is always best to choose the lowest cost for materials. since the shipping time is longer, they should order the domestic materials because the additional cost is worth it to get the materials in time. even though the shipping time is longer, they should order the imported materials because they are less expensive and should arrive in plenty of time to build the product.