Answer:
The velocity of the student has after throwing the book is 0.0345 m/s.
Explanation:
Given that,
Mass of book =1.25 kg
Combined mass = 112 kg
Velocity of book = 3.61 m/s
Angle = 31°
We need to calculate the magnitude of the velocity of the student has after throwing the book
Using conservation of momentum along horizontal direction


Put the value into the formula


Hence, The velocity of the student has after throwing the book is 0.0345 m/s.
Answer:
The correct answer is "3899.92 N".
Explanation:
The given values are:
Force,

Ratio,

As we know,
Area, 
or,
⇒ 
On substituting the value of "A", we get
⇒ 
⇒ 
On applying cross-multiplication, we get
⇒ 
On substituting the given values, we get
⇒ 
⇒ 
⇒ 
Statements 1, 3, and 5 are true.
(A, C, and E)
the answer is true because evaporates can provide an ideal speed racing surface