A box slides across a frictionless horizontal surface with constant acceleration 3.40 m/s2 and over a time interval reaches a final velocity of 13.0 m/s.

a. If its initial velocity is 6.50 m/s, what is its displacement (in m) during the time interval?

b. What is the distance it travels during this interval?

c. If its initial velocity is -6.00 m/s what is its displacement during the time interval?

d. What is the total distance it travels during the interval in part (c)?

An ambulance emits a frequency of 450 hz from its siren. what frequency is heard by a man as the ambulance moves toward him? less than 450 hz more than 450 hz 450 hz 0 hz

Acar of mass m goes around a banked curve of radius r with speed v. if the road is frictionless due to ice, the car can still negotiate the curve if the horizontal component of the normal force on the car from the road is equal in magnitude to 101) a) mv2/r b) mg/2. d) mg e) tan[v2/(eg)]

Apositive charge moves in the direction of an electric field. which of the following statements are true? check all that apply. check all that apply. 1.the potential energy associated with the charge decreases. 2. the electric field does positive work on the charge. 3. the electric field does negative work on the charge. 4. the potential energy associated with the charge increases. 5. the electric field does not do any work on the charge. 6. the amount of work done on the charge cannot be determined without additional information.