Question

the motion of a body of mass 5kg is shown in the velocity(v) versus time (t) graph. the dforce acting on the body is

a zero
b 6.5 N
c 9.5 N
d 12.5 N
​

Answer 1

Potential energy is energy stored in an object. This energy has the potential to do work. Gravity gives potential energy to an object. This potential energy is a result of gravity pulling downwards. The gravitational constant, g, is the acceleration of an object due to gravity. This acceleration is about 10 meters per second on earth. The formula for potential energy due to gravity is PE = mgh. As the object gets closer to the ground, its potential energy decreases while its kinetic energy increases.

Potential energy is energy stored in an object. This energy has the potential to do work. Gravity gives potential energy to an object. This potential energy is a result of gravity pulling downwards. The gravitational constant, g, is the acceleration of an object due to gravity. This acceleration is about 10 meters per second on earth. The formula for potential energy due to gravity is PE = mgh. As the object gets closer to the ground, its potential energy decreases while its kinetic energy increases. In this case, a body of mass 5 kg kept at a height of 10 m. So the potential energy is given as 5 * 10 *10 = 500 J.

Potential energy is energy stored in an object. This energy has the potential to do work. Gravity gives potential energy to an object. This potential energy is a result of gravity pulling downwards. The gravitational constant, g, is the acceleration of an object due to gravity. This acceleration is about 10 meters per second on earth. The formula for potential energy due to gravity is PE = mgh. As the object gets closer to the ground, its potential energy decreases while its kinetic energy increases. In this case, a body of mass 5 kg kept at a height of 10 m. So the potential energy is given as 5 * 10 *10 = 500 J.Hence, the potential energy of a body of mass 5 kg kept at a height of 10 m is 500 J.

Answer 2

Answer:

d. 12.5 N

Explanation:

Given :-

(Velocity-Time graph)

Object with mass : 5 kg

To find :-

Force acting on the body

Solution :-

Force = mass × acceleration

mass :-

5 kg

acceleration :-

(slope of Velocity-Time graph)

(according to graph, velocity was 15 m/s at 6 sec.)

15/6 m/s

2.5 m/s

Force = 5 × 2.5 (N)

Force = 12.5 (N)

Hence, the force acting in the body was 12.5 N.