Vector addition is used when motion involves

A. more than one direction.

B. more than one velocity.

C. more than one speed.

D. all of the above

1 Cal = 4.186 J, is called a. Mechanical equivalent of heat b. Equivalence between mechanical energy and internal energy c. Both a and b.

A cat is being chased by a dog. Both are running in a straight line at constant speeds. The cat has a head start of 3.8 m. The dog is running with a speed of 8.9 m/s and catches the cat after 6.0 s. How fast did the cat run?

Decide whether each activity is aerobic or anaerobic exercise. sprinting to catch the bus

What best explains the speed of sound in different states of matter? Sound travels fastest in ice because energy is easier to transfer when the molecules are close together.

A cup of coffee is on a table in an airplane flying at a constant altitude and a constant velocity. the coefficient of static friction between the cup and the table is 0.180. suddenly, the plane accelerates forward, its altitude remaining constant.

1:a boy 2 a girl pulling a heavy crate at the same time w/10 unite of force each. What is the net force acting on the object

Animals that can hear ultrasonic sounds are the what

If the rock has a mass of 1 kg which is the speed of the rock after it has fallen for two seconds

2 Cars A and B both at rest are to set of from a town to a common destination along the same route. Car A was the first to take off and travelled at 2.

In an experiment to measure the acceleration due to gravity, g two values, 9.72 m/s2 and 9.67 m/s2, as determined. if the accepted value of g is: 9.8 m/s2 find the followings: i) the percentage difference of the measurements?