2.04: Scalars and Vectors

Which description includes a vector quantity? (2 points) Select one: a. The car is moving at 70 miles/hr. b. The car's velocity changes at 9.8 m/s2. c. The plane is flying at 850 miles/hr. d. The box moved left 20 meters.

d. The box moved left 20 meters.

John walks to school in the morning then walks home for lunch. The school is 250 meters directly north of his house. After lunch, he goes back to school and then to a friend's house that is 550 meters south of the school. What is John's resultant displacement when he remains at his friend's house? (2 points) Select one: a. 300 meters south b. 800 meters south c. 300 meters north d. 800 meters north

a. 300 meters south

Which description includes a scalar quantity? (2 points) Select one: a. The car is moving at 70 miles/hr. b. Objects accelerate on Earth at 9.8 m/s2 downward. c. The plane is flying west at 850 miles/hr. d. The box moved 20 meters to the left.

a. The car is moving at 70 miles/hr.

John walks to school in the morning and then walks home for lunch. The school is 1000 meters directly north of his house. After lunch, he goes back to the school and then to the field for track that is 30 meters north of the school. What is John's resultant displacement when he remains on the field to run track? (2 points) Select one: a. 30 meters north b. 970 meters north c. 1030 meters north d. 3000 meters north

c. 1030 meters north

hat is the resultant displacement of the two vectors below? (2 points)Vector 1: 2.0 cm, E Vector 2: 3.0 cm, N Select one: a. 5.8 cm, 59 degrees East of the North axis b. 5.4 cm, 34 degrees East of the North axis c. 3.6 cm, 56 degrees North of the East axis d. 3.6 cm, 34 degrees North of the East axis

c. 3.6 cm, 56 degrees North of the East axis

The speedometer of a car moving reads 55 mph. It passes another car traveling at 55 mph. The cars have the same ____. (2 points) Select one: a. speed b. velocity c. direction d. acceleration

a. speed

A hot air balloon travels 18 kilometers west and then travels 50 kilometers east. What is the current position of the hot air balloon? (2 points) Select one: a. 68 kilometers east of its starting location. b. 32 kilometers east of its starting location. c. 32 kilometers west of its starting location. d. 50 kilometers west of its starting location.

b. 32 kilometers east of its starting location.

A vehicle travels 57 kilometers north and then travels 26 kilometers south. What is the current position of the vehicle? (2 points) Select one: a. 26 kilometers south of its starting location. b. 83 kilometers from its starting location. c. 31 kilometers north of its starting location. d. 83 kilometers north of its starting location.

c. 31 kilometers north of its starting location.

What is the resultant displacement of the two vectors below? (2 points)Vector 1: 5.0 cm, WVector 2: 3.0 cm, S Select one: a. 4.0 cm, 59 degrees West of the South axis b. 9.7 cm, 31 degrees West of the South axis c. 8.2 cm, 60 degrees South of the West axis d. 5.8 cm, 31 degrees South of the West axis

d. 5.8 cm, 31 degrees South of the West axis