Projectile Motion, Relative Motion, and Newton's Laws

Question 1

A projectile vertical velocity will be zero at what point?

Accepted Answer

The maximum height of the toss

Question 2

Angle of ramp 35o; mass of block 12 kg; what is the magnitude of the normal force on the block?

Accepted Answer

96.3 N

Question 3

How much friction required to hold a 10 kg block on a 20o slope with μs=0.7?

Accepted Answer

33.5 N

Question 4

What force will be needed to accelerate a 10 kg block at 5 m/s2?

Accepted Answer

50 N

Question 5

What is the maximum height of a projectile launched at 60o at a speed of 25 m/s?

Accepted Answer

23.9 m

Question 6

What is the direction of a plane that is flying at 200 mph north in a wind that is 50 mph west?

Accepted Answer

14o W of N, 76o N of W

Question 7

What is Newton's 1st law?

Accepted Answer

Inertia, An unbalanced force is required to create an acceleration.

Question 8

Two cars moving toward each other at 15 m/s and 20 m/s will close a 1 km gap in how much time?

Accepted Answer

28.6 s

Question 9

What is Newton's 2nd law?

Accepted Answer

Force is proportional to mass times acceleration., F = m x a

Question 10

Coefficient of static friction = 0.5; mass = 20 kg; how much force required to get moving?

Accepted Answer

98 N

Question 11

What is the distance from the pitching rubber to home plate in softball?

Accepted Answer

43 ft

Question 12

Which is an example of Newton's 3rd law?

Accepted Answer

If a person pushes wall with 100 N, wall pushes back -100 N.

Question 13

What teams are participating in the 2017 World Series?

Accepted Answer

Houston Astros, LA Dodgers

Question 14

What will be the range of a projectile launched at an angle of 30 degrees at a speed of 50 m/s?

Accepted Answer

221 m

Question 15

What is the relative speed of a train to you if you are running at 10 m/s and the train 20 m/s?

Accepted Answer

10 m/s

Questions 15