1. A worker pulls horizontally on a crate across a rough horizontal surface, causing it to move forward with constant velocity. Force A is the force exerted by the worker and force B is the force of friction due to the surface. What is the relationship between A and B?
A. A>B
B. A<B
C. A=B
2. A boy pushes a box with force of 150 N at a angle of 40° with a flat floor. What component of his force is directed downward, or into the floor?
A. 96.4 N
B. 114 N
C. 150 N
D. 40 N
3. Which type of force can act through empty space?
A. magnesium
B. spring
C. normal
D. tension s
4. Which of these objects has the greatest inertia?
A. aircraft carrier
B. airplane
C. bowling ball
D. pillow
Help please!!!
2 answers
What is your question on these?
I don't know 1
2. 150cos(40)=144
B. 144N
3. Magnetism is the force of attraction or repulsion in magnetism. This is the only force that can act through empty space.
A. Magnetism
4. The inertia of an object is directly proportional to the objects mass.
A. Aircraft carrier
2. 150cos(40)=144
B. 144N
3. Magnetism is the force of attraction or repulsion in magnetism. This is the only force that can act through empty space.
A. Magnetism
4. The inertia of an object is directly proportional to the objects mass.
A. Aircraft carrier
1 answer