Question

Question 2 According to Newton's Laws of Motion, if I throw a baseball in outer space - far from any other object- how will that ball move over time? (For the sake of this problem, let's neglect my mass) After the force of my hand no longer acts on the ball: Question 2 options:

the ball will move forward, but it will gradually slow down and come to a stop

once the force of my hand no longer acts on it, the ball will stop almost immediately

the ball will continue moving with a constant velocity (at the same speed in the same direction) unless an outside force acts on it

after my hand no longer acts on the ball, it will start moving faster and faster

Question 3 (1 point) Question 3 Newton's Laws of Motion are valid: Question 3 options:

in all reference frames

in non-inertial reference frames

in all inertial reference frames

Question 4 (1 point) Question 4 Given our assumption that for the problems we do in this course, we can treat the Earth as an inertial reference frame, which of the following would be considered an inertial reference frame? (check all that apply) Question 4 options:

the inside of a gymnasium

the inside of a train moving east at 30 m/s

the inside of a truck that is accelerating 2 m/s2

on the highway the inside of an airplane moving west at 120 m/s

Question 6 (1 point) Question 6 Mars has less gravitational attraction than Earth. If the location of my textbook changes from the Earth to Mars, what can be said about its mass? The textbook has Question 6 options:

more mass on Earth, less mass on Mars

the same mass on Earth as it has on Mars

less mass on Earth, more mass on Mars

Question 7 (1 point) Question 7 Unsaved Mars has less gravitational attraction than Earth. If the location of my textbook changes from the Earth to Mars, what can be said about its weight. The textbook has Question 7 options:

more weight on Earth, less weight on Mars

the same weight on Earth as it has on Mars

less weight on Earth, more weight on Mars

Question 8 (1 point) Question 8 Unsaved Three forces act on a cart as shown in the diagram. Will the cart experience an acceleration? Question 8 options:

no, the forces all cancel out

yes, upward yes,

downward yes,

to the right

yes, to the left

Question 10 (1 point) Question 10 Unsaved Why are Normal forces called Normal? Because Question 10 options:

it is normal for a surface to exert a force on objects

they are always directed perpendicular to the surface that exerts them

it is normal for us to consider them

normal is the ancient Greek word for surface

Question 11 (1 point) Question 11 What direction does the tension in a rope act? Question 11 options:

parallel to the rope

perpendicular to the rope

it depends on the details of the problem

Question 12 (1 point) Question 12 How does the tension at the opposite ends of an uninterrupted section of rope compare? Question 12 options:

equal in magnitude and opposite in direction

the tension at the end closer to the applied force is larger than at the far side of the rope

the tension at the end farther from the applied force is larger than at the end of the rope where the force is applied

Question 14 (1 point) Question 14 Which of the following should you include in your drawing of the free body diagram? Question 14 options:

detailed drawing of the object including the length, width and height of the object

the forces acting on the object

the forces exerted by the object

the acceleration

the velocity

Answer 1

Q2)correct Ans

the ball will continue moving with a constant velocity (at the same speed in the same direction) unless an outside force acts on it

Reason:I have assumed there is no fritional forces so according to Newton's law of inertia, an object in motion will continue to move until and uncless some unbalanced force acts on it.

q3)in all inertial reference frames

q4)the inside of a truck that is accelerating 2 m/s2

q6)the same mass on Earth as it has on Mars

mass is conserved, but weight is not, mass will remains same on both the planets but weight will change according to W = mg.

q7)more weight on Earth, less weight on Mars

weight will change according to W = mg. So more the gravitational acceleration, more will be the weight.

q8)Diagramis not given

q10)they are always directed perpendicular to the surface that exerts them

q11)parallel to the rope

q14)the forces acting on the object