Work is done if you push a child in a wagon.

a. True

b. False

Dźwig podniósł kontener o masie m = 80 kg na wysokość h = 10 m. Pierwsze 5 m kontener przebył z przy- spieszeniem o wartości a = 1 m/s2, a następne 5 m - ruchem jednostajnym. Przyjmij, że g = 10 m/s2.

Leaving the distance between the 97 kg and the 548 kg masses fixed, at what distance from the 548 kg mass (other than infinitely remote ones) does the 69.7 kg mass experience a net force of zero?

A proton moving at 8.00 106 m/s through a magnetic field of magnitude 1.72 T experiences a magnetic force of magnitude 7.20 10-13 N. What is the angle between the proton's velocity and the field? (Enter both possible answers from smallest to largest.

If an object moves in uniform circular motion in a circle of radius R = 1.0 meter, and the object takes 4.0 seconds to complete ten revolutions, calculate the magnitude of the velocity around the circle.

Name 2 causes of energy transfer

1. What is the speed of sound in air that has a temperature of 90.0 °C?

What effect does a doubling of the mass have upon the acceleration of the object? Be quantitative.

What type of intermolecular forces would you expect to find in a pure liquid sample of carbon tetrachloride?

Describe how rockets lift off.

Which of the pollutants shown in Figure 4-2 are considered to contribute to the pollution problem known as acid precipitation?