A balloon is climbing vertically upwards with a constant velocity of 4.2ms". A sandbag is dropped from the balloon and hits the ground 3.6 seconds later.
Calculate or find:

a) Velocity of the sandbag as it hits the ground.

b) Height of the sandbag at the instant that it is dropped.

When a resistor with resistance r is connected to a 1.50-v flashlight battery, the resistor consumes 0.0625 w of electrical power. (throughout, assume that each battery has negligible internal resistance.) what power does the resistor consume if it is connected to a 12.6-v car battery? assume that r remains constant when the power consumption changes.

Aspecial electronic sensor is embedded in the seat of a car that takes riders around a circular loop-the-loop ride at an amusement park. the sensor measures the magnitude of the normal force that the seat exerts on a rider. the loop-the-loop ride is in the vertical plane and its radius is 23 m. sitting on the seat before the ride starts, a rider is level and stationary, and the electronic sensor reads 740 n. at the top of the loop, the rider is upside down and moving, and the sensor reads 370 n. what is the speed of the rider at the top of the loop?

Atrain departs from its station at a constant acceleration of 5 m/s. what is the speed of the train at the end of 20s?