Answer:
The object keeps moving at the same speed and direction.
Explanation:
This is because the balanced forces acting on the object cancel out each other since the are in opposite directions, leaving only the original force acting on the object which is causing its motion.To illustrate, let F₁ be the initial force and F₂ and F₃ be the balanced forces. The net force F = F₁ + F₂ + F₃. Since F₂ and F₃ are balanced, F₂ = -F₃ ⇒ F₂ + F₃ = 0.
So,
F = F₁ + F₂ + F₃
= F₁ + (F₂ + F₃)
= F₁ + 0
= F₁
Which is the original force acting on the object. Thus, the object keeps moving at the same speed and direction
Answer:
i am guessing for reflection but not so sure
Answer: a) 60m/s b) 360m c) 180m
Explanation:
Projectile motion occurs when an object launched into space falls freely under the influence of gravity.
If the time of flight (T) = 2Usin(theta)/g where;
U is the velocity of the object
theta is the angle at which the object was thrown
g is the acceleration due to gravity
Given T = 6 seconds
theta= 90°(object launched upwards)
g = 10m/s²
U= ?
Substituting in the formula we have;
6 = Usin90°/10
60 = Usin90°
since sin90° = 1
U = 60m/s
The balls initial velocity is 60m/s.
b) Maximum Height reached (H) = U²sin²theta/g
Given U = 60m/s, theta = 90° g = 10m/s²
H = 60²(sin90°)²/10
H = 3600/10
H = 360m.
The maximum height reached is 360m
c) at maximum height, v = 0
Using v² = u² - 2gh
0 = 60² - 2(10)h
-3600 = -20h
h = 3600/20
h = 180m
The cliff is 180m tall
Nothing can travel faster than the speed of light. As such, perceptions of objects and time change as they approach light speed, but the laws of physics remain consistent regardless of speed. Objects will appear shortened and time will appear to slow down around an observer approaching near light speeds, but all quantities still exist as they did before and all causality is preserved, even if observers in different points or traveling at different speeds will report different things.
Answer:
Explanation:
Option a is correct
If puck and pick constitute a system then the momentum of the system is conserved but not this may not be valid for the puck .
Option e is correct
If puck and pick is the system then momentum is conserved but because of the presence of friction, mechanical energy is not conserved.
Friction will cause the energy to dissipate in heat.