Answer:
1. Collision- the sudden, forceful coming together in direct contact of two bodies
2. Newton's third law of motion is<em> naturally applied to collisions between two objects</em>. In a collision between two objects, both objects experience forces that are equal in magnitude and opposite in direction.
3. Momentum is the product of a moving object's mass and velocity. When two objects collide the total momentum before the collision is equal to the total momentum after the collision
Answer: 40
Explanation:
I believe this is correct. I did 60/1.5 to get 40/mph
Hi there!
Recall the equation for kinetic energy:
KE = Kinetic energy (J)
m = mass (kg)
v = velocity (m/s)
Plug in the given values:
Answer:
12 km/h
Explanation:
Let v represent Yashvi's speed in km/h.
time = distance/speed
48/v -1 = 48/(v+4) . . . . time is 1 hour less at v+4 km/h
48(v+4) -(v)(v+4) = 48v . . . . . multiply by v(v+4)
48v +192 -v^2 -4v = 48v . . . eliminate parentheses
v^2 +4v -192 = 0 . . . . . . . . . . put in standard form
(v -12)(v +16) = 0 . . . . . . . . . . factor
v = 12
Yashvi's speed is 12 km/hour.
__
<em>Check</em>
At 12 kph, it takes 48/12 = 4 hours to ride 48 km. At 12+4 = 16 kph, it takes 48/16 = 3 hours to ride 48 km. That's 1 hour less, as it should be
