2. which of the following is an example of acceleration.

a. a twirling ballerina
b. a car on a cruise control going 50 m/s east
c. mrs. crisp sliding on the gym floor at +2.23 m/s
d. a remote control car traveling at a constant rate 5 m/h

Agymnast dismounts off the uneven bars in a tuck position with a radius of 0.3m (assume she is a solid sphere) and an angular velocity of 2rev/s. during the dismount she stretches out into the straight position, with a length of 1.5m, (assume she is a uniform rod through the center) for her landing. the gymnast has a mass of 50kg. what is her angular velocity in the straight position?

Aria drove to the store, did some shopping, and then came home. during maria's trip, when was her displacement equal to zero?

1. jay fills a wagon with sand (about 20 kg) and pulls it with a rope 30 m along the beach. he holds the rope 25° above the horizontal. the rope exerts a 20-n tension force on the wagon. how much work does the rope do on the wagon?