To take off, a fighter jet accelerates at an average velocity of 7.44 m/s 1 and requires 3.9 seconds. After 180 meters of takeoff, what was the jet's final takeoff speed?|
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- A certain freely falling object, released from rest, requires 1.95 s to travel the last 32.0 m before it hits the ground. (a) Find the velocity of the object when it is 32.0 m above the ground. (Indicate the direction with the sign of your answer. Let the positive direction be upward.) m/s (b) Find the total distance the object travels during the fall. mConsider a grey squirrel falling from a tree to the ground. Use a coordinate system in which positive is downward for this problem. a) Find the squirrel’s velocity, in meters per second, just before hitting the ground when it falls from a height of 1.3 m. Ignore air resistance. b) The squirrel softens its landing by bending its legs when it touches the ground, thereby stopping itself over a distance of 7.6 cm. Assuming a constant rate of deceleration, find the squirrel’s acceleration during this process, in meters per second squared.A skydiver falls d1=355m in t1=8.7s before opening her parachute. After the chute opens, she falls an additional d2=780m in t2=116s. Calculate the skydiver’s average speed, v avg in meters per second, during the entire fall.
- 10: A bullet is shot straight up into the air from ground level. It reaches a maximum height at h = 366 m. (a) Calculate the initial speed of the bullet, in m/s. (b) Using your previous results, calculate the total flight time, tt in seconds, until the bullet reaches the ground.A stone is thrown vertically upward with an initial speed of 20 m/s. When it returns, it falls into a hole that is 10.0 m deep. How long (in seconds) is the rock in the air, from the instant it is tossed until it hits the bottom of the hole? Use -9.80 m/s2 for the local acceleration due to gravity and assume no significant air resistance.A swimmer bounces straight up from a diving board and falls feet first into a pool. She starts with a velocity of 3.00 m/s, and her takeoff point is 1.30 m above the pool.(a) How long are her feet in the air? s(b) What is her highest point above the board? m(c) What is her velocity when her feet hit the water? m/s