Answer:
height is 4 times
Explanation:
speed of ball hit by Luis is u
speed of ball hit by Ron is 2u
Let the maximum height traveled by the ball hit by Luis is h and by the ball hit by Ron is h'
At maximum height, the final velocity of ball is zero in both the cases.
Use third equation of motion, we get
For Luis :
.... (1)
For Ron :
.... (2)
Divide equation (2) by equation (1), we get
h' = 4 h
Thus, the statement of third student is wrong.
Answer:
9 and 3 N
Explanation:
Forces in the same direction sum up to produce the resultant force;
One force subtract the other will give the resultant force when they are in opposite directions;
Lets say one direction is forwards and the opposite backwards;
We have one force, let's say force A, in the forwards direction and another force, force B, acting in the same (forwards) or opposite (backwards) direction;
If B is acting in the same direction, then the resultant force (in this case) will be as follows:
A + B = 12
If B is acting in the opposite direction, then the resultant force will be as follows:
A - B = 6
Summing the two equations will allow us to solve for A:
A + B + (A - B) = 12 + 6
2A = 18
A = 9
Substitute this into either of the above equations and we can solve for B:
(9) - B = 6
B = 9 - 6
B = 3
Answer:
Personally I say the yellow truck but...
Explanation:
It's heavily based on the object's mass...
If you know which object has the most mass than I would choose that one, but personally I think the yellow one has the most mass...
Answer:
<em>A. 22 </em>
<em>B. NO</em>
Explanation:
<u>A.</u>
During a collision , <em>the net external force on the system is zero .</em>
hence , the total momentum of the system can be CONSERVED .
let the mass of frosty and snowflake be m ;
- initial velocity of frosty be = 25
- final velocity of frosty be = 13
- initial velocity of snowflake be = 10
- final velocity of snowflake be = x
therefore from principle of conservation of momentum ,
<em></em>
so ,
<u>answer for A. 22 </u>
<u>B</u>.
<em>The collision is NOT ELASTIC.</em>
this is because if it had been elastic , the coefficient of restitution should have been 1 but it isnot i.e
≠ 1
<em>thus it's an inelastic collision.</em>
Which ones do you need help with?