One object is thrown up at a velocity of 9.2 m/s from a certain height. 0.9 seconds later a second object is thrown up at 16 m/s from the same height. What is the velocity of the second object in m/s at the instant it collides with the first object?

A hot-air balloon is rising upward with a constant speed of 2.18 m/s. When the balloon is 2.44 m above the ground, the balloonist accidentally drops a compass over the side of the balloon. How much time elapses before the compass hits the ground?

The force exerted by the wind on the sails of a sailboat is 430 N north. The water exerts a force of 170 N east. If the boat (including its crew) has a mass of 280 kg, what are the magnitude and direction of its acceleration?

The total resistance of a circuit is 80 ohms. Resistor 1= 220 ohms, resistor 2= 1232 ohms, what does resistor 3 equal?

The speed of a moving bullet can be deter- mined by allowing the bullet to pass through two rotating paper disks mounted a distance 85 cm apart on the same axle. From the angular displacement 49 of the two bullet holes in the disks and the rotational speed 1142 rev/min of the disks, we...

You are driving home from school steadily at 87 km/h for 133 km. It then begins to rain and you slow to 75 km/h. You arrive home after driving 3 hours and 23 minutes. What was your average speed? Round your answer to 2 decimal places.

An airplane is heading due south at a speed of 600 {\rm km/h}. If a wind begins blowing from the southwest at a speed of 90.0 {\rm km/h} (average). Calculate magnitude of the plane's velocity, relative to the ground. Calculate direction of the plane's velocity, relative to the ground....

A car is traveling along a straight road at a velocity of +34.0 m/s when its engine cuts out. For the next ten seconds, the car slows down, and its average acceleration is a1. For the next five seconds, the car slows down further, and its average acceleration is a2. The velocity of the car at the...

During a hard sneeze, your eyes might shut for 0.40 s. If you are driving a car at 78 km/h during such a sneeze, how far does the car move during that time?

f one were placed on the moon by an astronaut and the other were left on the earth, and if they were connected by a very light (and very long!) string, what would be the tension in the string? Express your answer in newtons and in pounds.