1. [-/2 Points] DETAILS OSCOLPHYS1 2.P.012.WA. MY NOTES Influenced by the gravitational pull of a distant star, the velocity of an asteroid changes from from + 19.6 km/s to -18.6 km/s over a period of 1.83 years. (a) What is the total change in the asteroid's velocity? (Indicate the direction with the sign of your answer.) m/s (b) What is the asteroid's average acceleration during this interval? (Indicate the direction with the sign of your answer.) m / s Supporting Materials Physical Constants Submit Answer 2. [-/2 Points] DETAILS OSCOLPHYS1 2.4.018. MY NOTES A commuter backs her car out of her garage with a constant acceleration of 1.60 m/s2. (a) How long does it take her to reach a speed of 2.30 m/s? b) If she then brakes to a stop in 0.8 s, what is her (constant) deceleration? m/s2 3. [-/2 Points] DETAILS WEBASSIGNALGPHYS1 2.4.003. MY NOTES A plane lands on a runway with a speed of 135 m/s, moving east, and it slows to a stop in 12.0 s. What is the magnitude (in m/s ) and direction of the plane's average acceleration during this time interval? magnitude m/s2 direction --Select--- v Supporting Materials Physical Constants