Answer:
2.75 N
Explanation:
Given that,
Box A has a mass 21.0 kg and box B has a mass 8.0 kg.
A horizontal force of 100N is exerted on box A.
Let a be the acceleration of the system. Using second law of motion,
Now applying Newton's second law to box B. So,
So, 2.75 N is the force that box A exerts on box B.
It moves relative to the stars
Answer:
(a) 0.061 m/s
(b) 0.103 m/s
Explanation:
From the law of conservation of momentum, the sum of initial momentum equals the sum of final momentum
Momentum, p=mv where m is the mass and v is the velocity
where 
is the common velocity, 
is the velocity of the ball 
and 
are masses of the ball and person respectively
Substituting the given values then
(b)
Momentum, p=mv where m is the mass and v is the velocity
is the velocity of the ball , 
is the velocity of ball afterwards and 
is your speed, and are masses of the ball and person respectively. Since it bounces back, we give it a negative value hence
Answer:
The answer is C)The force of gravity from Earth acting on the spacecraft decreased because the distance from Earth increased.
Explanation:
Gravity, a force, is dependent on the mass of the object exerting the gravity and the distance of an outside object from that object. The larger the object, the more gravity it will exert on an outside object. This force decreases as you move away from the object, but it will always still exist and never be equal to 0.
