Question

In: Physics

F(t)=20t-10t^2+150 You have the above time dependent force acting on a 120 kg block, opposing its...

F(t)=20t-10t^2+150

You have the above time dependent force acting on a 120 kg block, opposing its motion. The block was initially traveling at 10 m/s along a flat, frictionless surface, and the force acts for a length of time until the force first reaches zero.

How fast is the block traveling once the force has stopped?

2 m/s

3 m/s

4 m/s

5 m/s

6 m/s

7 m/s

8 m/s

You have the above time dependent force acting on a 120 kg block, opposing its motion. The block was initially traveling at 10 m/s along a flat, frictionless surface, and the force acts for a length of time until the force first reaches zero.

How much Impulse does this force supply by the time it stops?

30 kg m/s

333 kg m/s

767 kg m/s

583 kg m/s

85 kg m/s

You have the above time dependent force acting on a 120 kg block, opposing its motion. The block was initially traveling at 10 m/s along a flat, frictionless surface, and the force acts for a length of time until the force first reaches zero.

How long, in seconds, until the force stops acting on the block?

8 s

4 s

7 s

3 s

5 s

2 s

6 s

A 5 kg ball is traveling to the right at a speed of 12 m/s.  A 2 kg ball is traveling to the left at 30 m/s.  They collide in a head-on perfectly elastic collision.  

What is the final speed of the 2 kg ball?

0 m/s

12 m/s

17 m/s

30 m/s

42 m/s

A 5 kg ball is traveling to the right at a speed of 12 m/s.  A 2 kg ball is traveling to the left at 30 m/s.  They collide in a head-on perfectly elastic collision.  

What is the final speed of the 5 kg ball?

0 m/s

12 m/s

17 m/s

30 m/s

42 m/s

A 5 kg ball is traveling to the right at a speed of 12 m/s.  A 2 kg ball is traveling to the right at 30 m/s as well.  They collide in a rear end inelastic collision.  

What is their final speed?

0 m/s

12 m/s

17 m/s

30 m/s

42 m/s

Solutions

Expert Solution


Related Solutions

A 100 kg ball has a force acting on it. This force is: F(t) =.4ti -.7tj...
A 100 kg ball has a force acting on it. This force is: F(t) =.4ti -.7tj when t = 0 seconds then x = 0 meters initial velocity: v = 3i - 2j Question: How do you find velocity and displacement the at 4 seconds? I am not sure how to apply integration to this problem. Please show step by step how to solve.
You push a 2 kg block down a ramp. You apply a force of 9 N...
You push a 2 kg block down a ramp. You apply a force of 9 N that is directed along and down the ramp with a coefficient of kinetic friction of 0.20. The block travels from rest to 4 m/s over a distance of 2 meters. Use g = 10 m/s/s. Report using 3 significant digits. How many Newton's second law equations can you write for this problem? Group of answer choices 4 3 2 1 How many forces are...
2. You have the following incomplete information on yields, forward rates from time t-1 to t,...
2. You have the following incomplete information on yields, forward rates from time t-1 to t, and prices (risk-free, zero-coupon bonds with face amount $100): Maturity Yield Price Forward Rate 1 P1=98.00 2 f2=2.50% 3 y3=2.50% Given this information, what is the price of a 3-year, 5%, annual-pay, coupon bond with face amount $1,000? (Please fill in the table as well.)
An undamped spring - mass system with mass m = 2 and a spring constant k = 8 is suddenly set in motion at time t = 0 by an external force f = 5 cos 3t . Determine the position of the mass as a function of time and draw the graph .
An undamped spring - mass system with mass m = 2 and a spring constant k = 8 is suddenly set in motion at time t = 0 by an external force f = 5 cos 3t . Determine the position of the mass as a function of time and draw the graph .
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT