How much work is done on a 200 kg crate that is hoisted 2m in a time of 4s?
PHYSICS TEST 1
| Question | Answer |
|---|---|
| how much work is done on a 100 kg crate that is hoisted 2m in a time of 4s | 100 x 10N = 1000 x 2m = 2000j |
| How much power is required to raise a 200-kg crate a vertical distance of 2 m in a time of 4 s? | 200 x 10 = 2000 x 2m = 4000/4 = 1000 Watts |
Is a slingshot potential energy?
STEM Explanation: Things like slingshots work by storing energy in elastic materials, such as the rubber bands in this activity. The stored energy is called potential energy. When the rubber bands are released, the potential energy that has been stored up is converted into kinetic energy, which causes motion.
What is the minimum energy needed to change the speed of a 1600?
What is the minimum energy needed to change the speed of a 1600 kg sport utility vehicle from 15.0 m/s to 40.0 m/s? 800*40^2 – 800*15^2 = 1,100,000 J.
How large a net force is required to accelerate a 1600 kg SUV?
So, the net force is 2496 N.
Which statement is true if air resistance can be ignored?
Which statement is true if air resistance can be ignored? Both hit the ground at the same time. The one thrown at an angle hits the ground with a lower speed.
What is air resistance affected by?
The amount of air resistance an object experiences depends on its speed, its cross-sectional area, its shape and the density of the air. Air densities vary with altitude, temperature and humidity. Nonetheless, 1.29 kg/m3 is a very reasonable value. The shape of an object affects the drag coefficient (Cd).
Why does a feather and hammer hit the ground at the same time?
It is because it has a higher surface area to weight ratio, thus is slowed more by drag (or air resistance). On the moon there is no air, and no drag, and a hammer and a feather will fall at the same speed. The earth’s gravity pulls all objects down at the same rate(9.8 m/s 2), assuming there is no air resistance.
Why does feather and ball fall at same time?
In explaining Einstein’s theory, Cox said, “The reason the bowling ball and the feather fall together is because they’re not falling. They are standing still. There is no force acting on them at all.”
Will a bowling ball and a golf ball hit the ground at the same time?
Answer? They hit at the same time.
Why did the bowling ball hit the ground before a feather?
So, back to the bowling ball and the feather: The reason the bowling ball reaches the ground first is because air resistance has a bigger impact on the feather as it falls. That air resistance slows the feather down while not having much of an impact at all on the bowling ball.
When a ball rolls on the floor it will eventually stop what force causes the ball to stop?
friction
What has more inertia a bowling ball or a golf ball?
Whereas, an object with higher inertia requires more force to accelerate at the same rate. Since a bowling ball has more mass than a golf ball, the inertia of the bowling ball is more than a golf ball.
Which ball will be traveling faster when it hits the ground?
Which ball will be traveling faster when it hits the ground? -Ball 1 and ball 2 will be traveling equally fast when they hit the ground.