Consider the three following statements that concern two observers who are moving along the same line at different constant speeds with respect to an inertial frame. which of them are true? a. the observers will always disagree about the relative speed that each measures for the other's motion. b. the observers will always disagree about the length measured in the direction of the motion. c. the observers will always disagree about the time interval between two events.

option B and C

Explanation:

The correct answer is option B and C

the two observers are moving along the same line at different constant speed w.r.t inertial frame.

There will be argued on the length measured in the direction of motion and will also disagree about the time interval.

Time will be affected by the speed of motion as it's dependent on the speed.

Both of them will measure the same relative speed of each other. So, they won't disagree hence option A is not correct.

speed

ratio of distance traveled to time interval

net force

vector sum of forces on object

object

source of diverging light rays either luminous or illuminated

don't remove my answer im trying my best to answer them

explanation:

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards