Which is a vector quantity
? displacement distance speed time 2.
The thickness of a dollar bill
is closest to 10-4 m 10-2 m 10-1 m 101 m 3.
A race car travels 300 m west
in 3.0 s. What is the average velocity of the race car ? 10 m/s 10 m/s west 100 m/s 100 m/s west 4.
A person walks 4.0 m due
north, then turns and walks 3.0 m due east. What is the magnitude of the person's resultant displacement ?
1.0 m 3.5 m 5.0 m 7.0 m 5.
Which pair of vectors could
produce a resultant having a magnitude of 10 m ? 10 m, 10 m 10 m, 30 m 4.7 m, 4.7 m 4.7 m, 5.0 m 6.
What is the total displacement
of a student who walks 3 blocks east, 2 blocks north, 1 block west, and then 2 blocks south ? 0 2 blocks east 2 blocks west 8 blocks 7.
A baseball pitcher throws a
fastball at 42 m/s. If the batter is 18 m from the pitcher, approximately how much time does it take for
the ball to reach the batter ? 1.9 s 2.3 s 0.86 s 0.43 s 8.
A woman walks 5.0 m north then
5.0 m west. The resultant of these two vectors is approximately 5.0 m northwest 7.0 m northwest 5.0 m southwest 7.0 m southwest 9.
Which pair of vectors may
produce a resultant of 20. m ? 5.0 m and 10. m 20. m and 20. m 20. m and 50. m 30. m and 5.0 m 10.
If a woman runs 100 m north
and then 70 m south, her total displacement will be 30 m north 30 m south 170 m north 170 m south 11.
A 40. m vector directed east
and a 20. m vector directed south are added together. The magnitude of the resultant displacement is
closest to 20. m 40. m 45 m 60. m 12.
The average speed of a plane
was 600 km/h. How long did it take the plane to travel 120 km ? 0.2 hour 0.5 hour 0.7 hour 5 hours 13.
As a body falls freely near
the earth’s surface, its acceleration decreases increases remains the same 14.
An object, initially at rest,
falls freely near the earth’s surface. How long does it take the object to attain a speed of 98 m/s ? 0.1 s 10 s 98 s 960 s 15.
An object’s speed
changes from 10 m/s to 25 m/s during a 5.0 s period. What is the acceleration of the
object ? 3.0 m/s2 5.0 m/s2 15 m/s2 50. m/s2 16.
An object starting from rest
accelerates at a rate of 3.0 m/s2 for 6.0 s. The speed of the object at the end of this time is 0.5 m/s 2.0 m/s 3.0 m/s 18 m/s 17.
An object is displaced 3.0 m
to the west and then 4.0 m to the south. What is the angle between south and the resultant
displacement ? 37o 53o 45o 33o 18.
What is the speed of an
object that has fallen for 4.0 s near the Earth ? 9.8 m/s 19.6 m/s 29.4 m/s 39.2 m/s 19.
The length of a high school
physics classroom is probably closest to 10-2 m 10-1 m 101 m 104 m 20.
As an object falls freely
near the surface of the Earth its acceleration decreases increases remains the same