Answer:
Explanation:
Let the force applied by her be T on the rope . This force will create tension in the rope. It will act in upper direction on the crates . The weight of the crate will act in downward direction .
Net force on the crate = mg - T in downward direction
Applying Newton's law
mg - T = m a
a =0 ( speed is steady )
mg - T = 0
T = mg
= 25 x 9.8
= 245 N
Force to be applied by her
= 245 N
Answer:
The time taken by missile's clock is
Solution:
As per the question:
Speed of the missile,
Now,
If 'T' be the time of the frame at rest then the dilated time as per the question is given as:
T' = T + 1
Now, using the time dilation eqn:
(1)
Using binomial theorem in the above eqn:
We know that:
Thus eqn (1) becomes:
Now, putting appropriate values in the above eqn:
Answer:
A pie is cooked in an oven at 200 °C. The aluminium film that covered the pie can be touched soon after it is removed while the pie is still dangerously hot, explain this.
Explanation:
1.548 km i believe. since 60 minutes times 0.88 equals to 52.8 minutes and the bird travels 3 times his speed 52.8 times 3 = 154.8 then you convert that to km and its 1.548 km
Answer:
18.24 seconds
Explanation:
First you convert the km/h to m/s, 70km/h=(175/9)m/s,85km/h=(425/18)m/s.
You know it took 10 seconds for the police to reach 85 km/h. Calculate the distance that the car is ahead of the police (175/9)*10=1750/9m. Then by divide 1750/9 with 425/18, you will get the value 8.24. Add the 10 seconds with the 8.24 you will get 18.24 sec which is the total time.