Inclined Planes And Friction

A block slides down a frictionless inclined plane that makes an angle θ with the horizontal.

Which of the expressions shown below expresses force which is parallel to the inclined surface?

• mg cos

• mg sin

• g

• 2g

The normal force equals

• mg cos

• mg sin

• g

• 2g

Tags

NGSS.HS-PS2-1

A 25 N crate slides down a frictionless incline that is 25° above the horizontal. The magnitude of the normal force of the incline on the crate is:

• 11 N

• 23 N

• 25 N

• 100 N

A 25 N crate is held at rest on a frictionless incline by a force that is parallel to the incline. The incline is 25 degrees above the horizontal.

The magnitude of the applied force is ________

• 4.1 N

• 4.6 N

• 11 N

• 23 N

The diagram below shows a box held stationary on a ramp by a string connected to a wall.

Which of the following relationship is true?

• A

• B

• C

• D

Assuming both objects are at rest, which side of the string has more tension?

• There is more tension on the side by M1

• There is more tension on the side by M2

• The tension on both sides is the same

If both boxes are at rest in the picture above, what force is equal to the tension in the string?

• The weight of M1

• The weight of M2

• (M1)(g)cos28⁰

Which of the following is equal in magnitude to the Normal Force?

• (M1)(g)sin28⁰
• (M1)(g)cos28⁰
• (M2)(g)sin28⁰
• (M2)(g)cos28⁰

Tags

NGSS.HS-PS2-1

A 220 Kg crate is pushed horizontally with a force of 700 N. If the coefficient of kinetic friction is 0.20, calculate the acceleration of the crate.

• 1.02 m/s²

• 1.22 m/s²

• 1.42 m/s²

• 1.62 m/s²

A book is pushed across the table. It has a friction force of 50 N and a coefficient of friction of 0.30. Find the value normal force.

• 16.7 N
• 166.67 N
• 15 N