An object thrown at a certain angle to the ground moves in a curved path and falls back to the ground

Monjur Alahi

An object thrown at a certain angle to the ground moves in a curved path and falls back to the ground. The initial and the final points of the path of the object lie on the same horizontal line. What is the work done by the force of gravity on the object?


0 like 0 dislike
1 views
Share with your friends

1 Answers

Salim Ahmed Kawsar

Call

When the object moves upwards, the work done by gravity is negative (as the direction of gravitational force is towards the Earth’s center) and when the object come downwards, there is a positive work done. So, the total work down is zero in throughout the motion.

0 like 0 dislike
1 views
Talk Doctor Online in Bissoy App
A coin is tossed. If the outcome is a head, a die is thrown. If the die shows up an even number, the die is thrown again.

When a coin is tossed, the possible outcomes are head (H) and tail (T). When a die is thrown, the possible outcomes are 1, 2, 3, 4, 5, or 6. Thus, the...

1 Answers 1 views
An object of mass, m is moving with a constant velocity, v. How much work should be done on the object in order to bring the object to rest?

The object is in motion, so its energy = kinetic energy = 1 /2 mv2  The kinetic energy of the object, when it comes to rest = 0.  Work done on object...

1 Answers 1 views
According to the third law of motion when we push on an object, the object pushes back on us with an equal and opposite force.

The truck has a large mass. Therefore, the static friction between the truck and the road is also very high. To move the car, one has to apply a force...

1 Answers 3 views
If the displacement of an object is proportional to square of time, then the object moves with

(b) uniform acceleration

1 Answers 1 views
Most of the water that falls on the land as rain and snow, sooner or later goes back to a sea or an ocean. Explain how it happens?

Hint: Snow/Rain→Streams/Rivers→Sea/Ocean.

1 Answers 1 views
A person standing near the edge of the top of a building throws two balls A and B. The ball A is thrown vertically upward and B is thrown vertically ,

The correct answer is (c) vA = vB  Explanation: The ball 'A' thrown vertically upward will return back to the initial point with the same thrown speed but its direction will be downwards....

1 Answers 1 views
An object follows a curved path. The following quantities may remain constant during the motion

(a) speed (d) magnitude of acceleration. Explanation:  On a curved path, instantaneous direction of movement changes continuously. So, a vector can not remain constant on a curved path because it has both magnitude and direction. In the...

1 Answers 1 views
Light falls from glass (μ= 1.5) to air. Find the angle of incidence for which the angle of deviation is 90°.

Since, μ= 1.5, Critial angle = sin–1(1/μ) = sin–1 (1/1.5) = 41.8° We know, the maximum attainable deviation in refraction is (90° – 41.8°) = 47.2° So, in this case, total internal...

1 Answers 2 views
All the planets move around the Sun in a (i) Circular path (ii) Rectangular path (iii) Elongated path

(iii) Elongated path

1 Answers 1 views
An object follows a curved path. The following quantities may remain constant during the motion (a) speed

(a) speed (d) magnitude of acceleration. Explanation:  On a curved path, instantaneous direction of movement changes continuously. So, a vector can not remain constant on a curved path because it has both magnitude...

1 Answers 1 views
X