Answer:
the direction of rate of change of the momentum is against the motion of the body, that is, downward.
The applied force is also against the direction of motion of the body, downward.
Explanation:
The change in the momentum of a body, if the mass of the body is constant, is given by the following formula:
p: momentum
m: mass
: change in the velocity
The sign of the change in the velocity determines the direction of rate of change. Then you have:
v2: final velocity = 35m/s
v1: initial velocity = 40m/s
Hence, the direction of rate of change of the momentum is against the motion of the body, that is, downward.
The applied force is also against the direction of motion of the body, downward.
Answer:
v = 1.7 m/s
Explanation:
Given that,
Initial velocity of the object, u = 1 m/s
Acceleration of the object, a = 1 m/s²
We need to find the velocity of the object after moving 1 m. Let v be the velocity. Using third equation of kinematics to find it i.e.
So, the final velocity of the object is 1.7 m/s.
Answer:
The car moved a distance 
.
Explanation:
First we need to know: <em>How much time will the tomato spend in the air?</em>
From Kinematics: 
where 
and 
is gravity's acceleration.
When the tomato touches the car again, 
Then, we have:
⇒ 
Also from Kinematics we have: 
Which is very simple because we can take initial position 0 and there's no acceleration in the x direction. And 
So, taking 
