Mid Term Game Day

If a 25 kg toy car is traveling at a velocity of 4.5 m/s, what would be the acceleration of the toy car if it had a change in momentum of -112.5 kg x m/s in 2.5 s?

-1.8 m/s^2

A pendulum bob is released from some initial height such that the speed of the bob at the bottom of the swing is 1.9 m/s. What is the initial height of the bob?

0.18 m

A bullet is fired horizontally at a height of 1.3 meters at a velocity of 950 m/s. Assume no air resistance. How long until the bullet reaches the ground?

0.52 s

A jet plane lands with a speed of 100 m/s and can accelerate uniformily at a maximum rate of -5.0 m/s^2 as it comes to rest.How much of a runway does the plane need to safely land?

1.0 x10^3 m

If 2.0 J of work is done in raising a 180 g apple, how far is it lifted?

1.134 m

If a 8.0 x 10^4 kg airliner took 1.1 x 10^9 J to reach take off speed. How much power would be required to reach take off speed in 1.5 minutes?

1.22 x 10^7 W

If a 25 kg toy car is traveling at a velocity of 4.5 m/s, what would be the acceleration of the toy car if it had a change in momentum of 87.5 kg x m/s in 2.5 s?

1.4 m/s^2

Each croquet ball in a set has a mass of 0.50 kg. The green ball, traveling at 12.0 m/s, strikes the blue ball, which is traveling at -8 m/s. Assuming that the balls slide on a frictionless surface and all collisions are head-on, find the final speed of the blue ball if the collison is elastic?

12 m/s

A weather report shows that a tornado was sighted 12 km South and 23 km West of dowtown Austin. The storm is reported to be movig directly towards downtown Austin with a speed of 82 km/hr. How long before the storm hits downtown Austin? (for this problem minutes is represented by m

19 m

A spring with a Force constant of 5.2 N/m has a relaxed length of 2.45 m. When a mass is attached to the to the end of the spring and allowed to come to rest, the vertical length of the spring is 3.57 m. How much power does the spring exact to go back to the rest position in 1.5 s?

2.2 W

A baseball is thrown at a 22.5° angle and an initial velocity of 65 m/s. Assume no air resistance. How far did the ball travel horizontally when it hit the ground?

305.05 m

A baseball is thrown at a 22.5° angle and an initial velocity of 65 m/s. Assume no air resistance. What is the ball's maximum height?

31.63 m

A boat is traveling east at a speed of 3.8 m/s. A person walks across the boat with a velocity of 1.3 m/s South. What is the person's speed relative to the water?

4.0 m/s

A ball is thrown horizontally at a height of 2.2 meters at a velocity of 65 m/s. Assume no air resistance. How far did the ball travel horizontally when it hit the ground?

43.55 m

Each croquet ball in a set has a mass of 500 g. The green ball, traveling at 12.0 m/s, strikes the blue ball, which is traveling at -8 m/s. Assuming that the balls slide on a frictionless surface and all collisions are head-on, find the final total Kinetic Energy of the elastic collision.

52 J

When driving down the road at 50 km/hr. How far would you travel in 5 s?

70 m

Each croquet ball in a set has a mass of 0.50 kg. The green ball, traveling at 12.0 m/s, strikes the blue ball, which is traveling at -8 m/s. Assuming that the balls slide on a frictionless surface and all collisions are head-on, find the final speed of the green ball if the collison is elastic?

8 m/s

A 2500 kg car traveling to the north is slowed down uniformly from an initial velocity of 20.0 m/s by a 6250 N braking force acting opposite the car's motion. How far does the car travel to come to a complete stop?

80 m

A cannonball is fired at a 45.0° angle and an initial velocity of 625 m/s. Assume no air resistance. How long would it take for the cannonball to reach the same elevation that it was fired from?

90.18 s