Work, Energy and Power Test

Result

Work, Energy and Power Test - 79

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

Two bodies P and Q have masses 5 kg and 20 kg respectively. Each one is acted upon by a force of 4 N. If they acquire the same kinetic energy in times t_p and t_q then the ratio t_p/t_q = ..........

A
1/2

B
2

C
2/5

D
5/6

Solution
Question 2
4 / -1

A

B

C

D

Solution
Question 3
4 / -1

A rifle bullet loss (1/10)^th of its velocity in passing through a plank. The least number of such planks required just to stop the bullent is

A
5

B
10

C
11

D
20

Solution
Question 4
4 / -1

A frictionless track 12345 ends in a circular loop of radius R. A body slids down the track from point 1 Which is 6 cm. Maximum value of R for the body to successfully complete the loop is

A
6 cm

B
15/4 cm

C
5/12 cm

D
12/5 cm

Solution
Question 5
4 / -1

A bomb of 12 kg divedes in two parts whose ratio of masses is 1:4. If kinetic energy of smaller part is 288 J, then momentum of bigger part in kgm/sec will be

A
48

B
72

C
108

D
Data is incomplete

Solution
Question 6
4 / -1

An ice-cream has a marked value of 700 kcal. How many kilo-watt-hour of energy will it deliver to the body as it is digested (J = 4.2 J/cal)

A
0.81 kwh

B
0.90 kwh

C
1.11 kwh

D
0.71 kwh

Solution
Question 7
4 / -1

A spherical ball of mass 15 kg stationary at the top of a hill of height 82m. It slides down a smooth surface to the ground, then climbs up another hill of height 32m and finally slides down to horizontal base at a height of 10 m above the ground. The velocity attained by the ball is

A

B

C

D

Solution
Question 8
4 / -1

A bomb of mass 10 kg explodes into 2 pieces of mass 4 kg and 6 kg. The velocity of mass 4 kg is 1.5 m/s, the K.E. of mass 6 kg is .......

A
3.84 J

B
9.6 J

C
3.00 J

D
2.5 J

Solution
Question 9
4 / -1

A bomb of mass 3.0 kg explodes in air into two pieces of masses 2.0 kg and 1.0kg. The smaller mass goes at a speed of 80m/s. The total energy imparted to the two fragments is

A
1.07 KJ

B
2.14 KJ

C
2.4 KJ

D
4.8 KJ

Solution
Question 10
4 / -1

The potential energy of a conservative system is given by U(X) = (x² – 5x) J. Then the equilibrium position is at....... (where x in m)

A
x = 1.5 m

B
x = 2m

C
x = 2.5 m

D
x = 5 m

Solution