Physics Webassign Help!!!!?

A drag racer, starting from rest, speeds up for 402 m with an acceleration of +22.0 m/s2. A parachute then opens, slowing the car down with an acceleration of -5.35 m/s2. How fast is the racer moving 2.90 102 m after the parachute opens?

A motorcycle is moving at 30 m/s when the rider applies the brakes, giving the motorcycle a constant deceleration. During the 4.0 s interval immediately after braking begins, the speed decreases to 16 m/s. What distance does the motorcycle travel from the instant braking begins until it comes to rest?

A startled armadillo leaps upward, rising 0.544 m in 0.170 s.

(a) What was its initial speed?

(b) What is its speed at this height?

(c) How much higher does it go?

A speedboat starts from rest and accelerates at +2.01 m/s2 for 6.60 s. At the end of this time, the boat continues for an additional 5.80 s with an acceleration of +0.518 m/s2. Following this, the boat accelerates at -1.49 m/s2 for 8.05 s.

A woman on a bridge 58.0 m high sees a raft floating at a constant speed on the river below. She drops a stone from rest in an attempt to hit the raft. The stone is released when the raft has 9.50 m more to travel before passing under the bridge. The stone hits the water 7.80 m in front of the raft. Find the speed of the raft.

A spelunker (cave explorer) drops a stone from rest into a hole. The speed of sound is 343 m/s in air, and the sound of the stone striking the bottom is heard 1.72 s after the stone is dropped. How deep is the hole?

A cab driver picks up a customer and delivers her 3.30 km away, driving a straight route. The driver accelerates to the speed limit and, upon reacing it, begins to decelerate immediately. The magnitude of the deceleration six times the magnitude of the acceleration. Find the lengths of the acceleration and deceleration phases of the trip.

A locomotive is accelerating at 1.6 m/s2. It passes through a 26.0 m wide crossing in a time of 2.4 s. After the locomotive leaves the crossing, how much time is required until its speed reaches 35 m/s?