Physics 220

1.

A car uniformly decelerates at a rate of -5.00 m/s². How far does the car travel after 1.50 seconds if it initially was moving at a speed of 25.0 m/s?

7.

A cannonball is fired horizontally with an initial velocity of 655 m/s from the end of a cliff 725 m high. How far in the x direction does the cannonball in the air before it hits the ground?

[removed]A) c. 5670 m
[removed]B) a. 7960 m
[removed]C) b. 4030 m
[removed]D) d. 9540 m

8.

A subatomic particle with mass m initially at rest suddenly decays. If one of the resultant particles with mass 0.40 m of mass leaves with a velocity of 5.5 x 10⁵ m/s, what is the velocity of the other particle created?

[removed]A) 2.5 x 10⁵ m/s
[removed]B) 3.7 x 10⁵ m/s
[removed]C) 3.3 x 10⁵ m/s
[removed]D) 6.0 x 10⁵ m/s