#WORK AND ENERGY
Horses running on a playground and comes to a skidding stop. The force applied on the horse due to play ground is 500 N,which is directly opposed to the motion of the horse. How much work does the horse do on the playground?
Horses running on a playground and comes to a skidding stop. The force applied on the horse due to play ground is 500 N,which is directly opposed to the motion of the horse. How much work does the horse do on the playground?
Anonymous Quiz
32%
500J
43%
Zero
15%
100J
10%
Insufficient data
#WORK AND ENERGY
Nuclear power plant operated 10^10 kW. How much mass is converted into energy per day?
Nuclear power plant operated 10^10 kW. How much mass is converted into energy per day?
Anonymous Quiz
32%
9.6kg
38%
7.6kg
24%
7.8kg
7%
8.6kg
#WORK AND ENERGY
Energy absorbed by solar panel is used to to charge battery.During the day, the battery stores 1.6 J of energy each second. At night, the battery is used to light A 1.2 W lamp for 18000 s.
Energy absorbed by solar panel is used to to charge battery.During the day, the battery stores 1.6 J of energy each second. At night, the battery is used to light A 1.2 W lamp for 18000 s.
Anonymous Quiz
18%
13505 s
48%
13500 s
26%
15300 s
8%
13050 s
#WORK AND ENERGY
A force of 5N acts on a 1.5kg body initially at rest.the work done by the force during the first second of motion of the body is
A force of 5N acts on a 1.5kg body initially at rest.the work done by the force during the first second of motion of the body is
Anonymous Quiz
21%
5J
48%
(5/6)J
18%
6J
13%
75J
#WORK AND ENERGY
A force is applied by an engine of a train of mass 2.05Ć10^6 kg changes its velocity from 5m/s to 25m/s in 5min. The power of engine is
A force is applied by an engine of a train of mass 2.05Ć10^6 kg changes its velocity from 5m/s to 25m/s in 5min. The power of engine is
Anonymous Quiz
30%
1.025 MW
41%
2.05 MW
20%
5 MW
10%
6 MW
#WORK AND ENERGY
Natural length of a spring is 60cm and its spring constant is 4000 N/m. A mass of 20 kg is hung from it. The extension produced in the spring is (take,g=9.8m/sĀ²)
Natural length of a spring is 60cm and its spring constant is 4000 N/m. A mass of 20 kg is hung from it. The extension produced in the spring is (take,g=9.8m/sĀ²)
Anonymous Quiz
27%
4.9cm
35%
0.49cm
27%
9.4cm
12%
0.94cm
#WORK AND ENERGY
a lorry and a car moving with the same KE are brought to rest by applying the same retarding force,then
a lorry and a car moving with the same KE are brought to rest by applying the same retarding force,then
Anonymous Quiz
32%
Lorry will come to rest in a certain distance
31%
Car will come to rest in a certain distance
31%
Both come to rest in same distance
6%
None of the above
#WORK AND ENERGY
Water falls from a height of 60 m at the rate of 50 kg/s to operate a turbine. The sosses due to frictional force are 10% of energy.How much power is generated by the turbine?(take,g=10m/sĀ²)
Water falls from a height of 60 m at the rate of 50 kg/s to operate a turbine. The sosses due to frictional force are 10% of energy.How much power is generated by the turbine?(take,g=10m/sĀ²)
Anonymous Quiz
23%
8.1kW
38%
10.2kW
30%
12.3kW
9%
7.9kW
#WORK AND ENERGY
A block of mass 10 kg is dropped from a height of 10 m from the Earth's surface and it falls onto a vertical helical spring of stiffness 5000 N/m and length 50 cm as shown in the figure.The compression of the springs is(take,g=10m/sĀ²)
A block of mass 10 kg is dropped from a height of 10 m from the Earth's surface and it falls onto a vertical helical spring of stiffness 5000 N/m and length 50 cm as shown in the figure.The compression of the springs is(take,g=10m/sĀ²)
Anonymous Quiz
31%
0.1m
33%
0.2m
30%
ā0.4m
6%
0.3m