Question

Which of the following best indicates the components of a vector that measures 30 m at 135°?

a)<21, 21> m

b)<-21, 21> m

c)<21, -21> m

d)<-21, -21> m

A student runs off of a diving platform with a speed of 2.5 m/s and hits the water 0.8 seconds later. What is the height of the platform?

	5.1 m
	0.9 m
	3.1 m
	6.2 m

Vector A has components A = <-2, 5> m/s and vector B has components B = <6, -2> m/s. What is the magnitude of vector C if C = A + B?

	25 m/s
	5 m/s
	11 m/s
	7 m/s

A student fires a bullet horizontally from a gun. Which statement is most accurate?

	The bullet will start to fall as soon as it leaves the gun.
	The bullet will move horizontally for some time before it starts to fall.
	The bullet will travel horizontally without falling.
	The question does not provide enough information.

Which of the following is an example of a vector measurement?

	Speed
	Distance
	Mass
	Acceleration
	More than one of the above

A person driving through a field has velocity components that are 30 m/s west and 20 m/s south. What is the approximate direction of the overall velocity?

	48°
	214°
	34°
	-34°

A student kicks a ball that is initially at rest on the ground. The ball leaves the student's foot with some velocity v at an angle θ. When the ball is at its maximum height, which statement is most accurate?

	At the maximum height, the velocity of the ball is zero.
	At the maximum height, the acceleration of the ball is zero.
	Both of the above are true.
	None of the above are true.

Answer 1

Which of the following best indicates the components of a vector that measures 30 m at 135°?

a)<21, 21> m

b)<-21, 21> m

c)<21, -21> m

d)<-21, -21> m

Answer-B

A student runs off of a diving platform with a speed of 2.5 m/s and hits the water 0.8 seconds later. What is the height of the platform?

5.1 m

0.9 m

3.1 m

6.2 m

Answer- 3.1m

Vector A has components A = <-2, 5> m/s and vector B has components B = <6, -2> m/s. What is the magnitude of vector C if C = A + B?

25 m/s

5 m/s

11 m/s

7 m/s

Answer-5m/s

A is student fires a bullet horizontally from a gun. Which statement is most accurate?

The bullet will start to fall as soon as it leaves the gun.

The bullet will move horizontally for some time before it starts to fall.

The bullet will travel horizontally without falling.

The question does not provide enough information.

Answer-The bullet will start to fall as soon as it leaves the gun.

Which of the following is an example of a vector measurement?

Speed

Distance

Mass

Acceleration

More than one of the above

Answer-Acceleration

A person driving through a field has velocity components that are 30 m/s west and 20 m/s south. What is the approximate direction of the overall velocity?

48°

214°

34°

-34°

Answer-214°

A student kicks a ball that is initially at rest on the ground. The ball leaves the student's foot with some velocity v at an angle θ. When the ball is at its maximum height, which statement is most accurate?

At the maximum height, the velocity of the ball is zero.

At the maximum height, the acceleration of the ball is zero.

Both of the above are true.

None of the above are true.

Answer-None of the above are true.