Một vật khối lượng 100 g dao động với ly độ: x = 10cos(4pi - pi / 2) (x tính cm; t tính s). 1. Xác định chu kỳ dao động của vật.

2. Tinh vận tốc cục đại của vật.

3. Tỉnh lỵ độ của vật ở thời điểm t=1s.

4. Tính động năng của vật khi vật ở cách vị trí cân bằng 5 cm.

Very large accelerations can injure the body, especially if they last for a considerable length of time. one model used to gauge the likelihood of injury is the severity index ( ), defined as =/ . in the expression, is the duration of the accleration, but is not equal to the acceleration. rather, is a dimensionless constant that = the number of multiples of that the acceleration is equal to.in one set of studies of rear-end collisions, a person's velocity increases by 13.7 km/h with an acceleration of 36.0 m/s2 . let the + direction point in the direction the car is traveling. what is the severity index for the collision?

Asap and show ! a 14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.

What will happen in a hybrid vehicle if current flow becomes too high due to a short?