Answer:
The strength of gravity on the moon is
.
Explanation:
We have,
Weight of the backpack, W = 9.2 N
Mass, m = 5 kg
It is required to find the strength of gravity on the moon. Weight of an object is given by :
W = mg
g is strength of gravity on the Moon

So, the strength of gravity on the moon is
.
Answer:
40 s
Explanation:
After 10 seconds, the first skater would have a 8m/s * 10s = 80 m head start
Let t be the number of seconds after the second skater starts will the second skater overtake the first skater
The distance traveled by the first skater after t seconds is

Similarly the distance traveled by the 2nd skater after t seconds is

Since the 2nd skater catches up to the 1st one after 80 m behind, the distance traveled by the 2nd one must be 80m greater than the distance of the 1st skater

We can substitute 



Answer:
matter is the correct answer.
Answer:
The mass of the block is 1250g.
Explanation:
Given that the formula for density is ρ = mass/volume. Then you have to substitute the values into the formula :

Let density = 250,
Let volume = 5,



Answer:443.1 s
Explanation:
Given
Engine of a locomotive exerts a force of 
Mass of train
Final speed (v)
F=ma
so 

and acceleration is


