Work, Energy and Power Test

Result

Work, Energy and Power Test - 36

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
4 / -1

when 2kg mass hangs to a spring of length 50 cm, the spring stretches by 2 cm. The mass is pulled down until the length of the spring becomes 60 cm. What is the amount of elastic energy stored in the spring in this condition, if g = 10 m/s².

A
10 J

B
2 J

C
2.5 J

D
5 J

Solution
Question 2
4 / -1

A particle of mass 0.1 kg is subjected to a force which varies with distance as shown in figure. If it starts its journey from rest at x = 0. What is the particle's velocity square at x = 6 cm ?

A
0 (m/s)²

B
240√2 (m/s)²

C
240√3 (m/s)²

D
480 (m/s)²

Solution
Question 3
4 / -1

If the K.E. of a body is increased by 44%, its momentum will increase by.......

A
20 %

B
22 %

C
2 %

D
120 %

Solution
Question 4
4 / -1

A bullet of mass 0.10 kg moving with a speed of 100 m/s enters a wooden block and is stopped after a distance of 0.20 m. what is the average resistive force exerted by the block on the bullet ?

A
2.5 × 10² N

B
25 N

C
25 × 10² N

D
2.5 × 10⁴ N

Solution
Question 5
4 / -1

A simple pendulum is released from A as shown in figure. If 10 g and 100 cm represent the mass of the bob and length of the pendulum. what is the gain in K.E. at B? ( g = 10 m/s²)

A
0.5 J

B
5 × 10^–2 J

C
5 J

D
0.5 × 10^–3 J
Question 6
4 / -1

A sphere of mass m moving the velocity v enters a hanging bag of sand and stops. If the mass of the bag is M and it is raised by height h, then the velocity of the sphere was

A

B

C

D

Solution
Question 7
4 / -1

A particle is acted upon by a force F which varies with position x as shown in figure. If the particle at x = 0 has kinetic energy of 20 J. Then the calculate the kinetic energy of the particle at x = 16 cm.

A
45 J

B
30 J

C
70 J

D
135 J
Question 8
4 / -1

If the water falls from a dam into a turbine wheel 19.6 m below, then the velocity of water at the turbine is ...... ( g = 9.8 m/s²)

A
9.8 m/s

B
19.6 m/s

C
39.2 m/s

D
98.0 m/s

Solution
Question 9
4 / -1

The bob of simple pendulum (mass m and length l) dropped from a horizontal position strike a block of the same mass elastically placed on a horizontal frictionless table. The K.E. of the block will be

A
2mgl

B
mgl/2

C
mgl

D
zero
Question 10
4 / -1

A gun fires a bullet of mass 40 g with a velocity of 50 m/s. Because of this the gun is pushed back with a velocity of 1 m/s. The mass of the gun is

A
1.5 kg

B
3 kg

C
2 kg

D
2.5 kg

Solution