Dana throws a baseball with an initial velocity of 20.2 feet per second at an angle of 69° with the horizontal. Find the initial vertical and horizontal velocity of the ball.

• Horizontal 18.9

  Vertical 7.2

• Horizontal 7.2

  Vertical 18.9

• Horizontal 15.2

  Vertical 9.6

• Horizontal 9.6

  Vertical 15.2

You need a ladder that will reach up a 25 foot tall house when placed 10 feet away from the house. How tall does the ladder need to be?

• 25 feet
• 26 feet
• 27 feet
• 28 feet

Tags

CCSS.8.G.B.8

What is the height of the tree? Round the the nearest foot. 

• 38 ft
• 63 ft
• 20 ft
• 98 ft

Tags

CCSS.HSG.SRT.C.8

Vectors a, b, c are defined as:

a = 2i + 5j; b = i - 3j; c = -3i - j. Answer all correct answers (remember, i = xhat, j = yhat, k = zhat

• a + b = 3i + 8j

• a - b = i + 8j

• a + c = -i + 4j

• c - b = -5i + 6j

Vector a = 2i + 3j - 5k. What is the value of 3a?

• 3i + 3j - 3k

• 5i + 6j - 8k

• 6i + 9j -15k

• 6i + 6j - 15k

Tags

CCSS.HSN-VM.B.5A

CCSS.HSN-VM.B.5B

A car moved 60 km East and 90 km West. What is the displacement and the direction?

• 30 km, West
• 60 km. East
• 90 km
• 150 km

Tags

CCSS.HSN-VM.B.4A

CCSS.HSN-VM.B.4B

Find h

• 35.60
• 35.00
• 35.71
• 61.03

Tags

CCSS.8.EE.A.2

What is the value of d? Round to the nearest tenth of a meter. 

• 18.9 m
• 19.5 m
• 47 m
• 27.5 m

You hit a wall with a stick. The Newton's third law force that completes this pair is _____

• the wall pushing against you

• the stick pushing against you

• you pushing against the stick

• the wall pushing against the stick

Newton's first law says that if an object has mass, it must also have ____

• weight

• velocity

• inertia

• energy