Homework Answers
A particle at t1 = -2.0 s is at x1 = 5.0 cm and at t2...
A particle at t1 = -2.0 s is at x1 = 5.0 cm and at t2 = 5.0 s is at x2 = 8.9 cm . What is its average velocity over this time interval? Can you calculate its average speed from these data?
20.50 1800 N e F 2.2 10 Specity the 2.0 eC 5.0 cm 180 :5.0cm 50cm...
20.50 1800 N e F 2.2 10 Specity the 2.0 eC 5.0 cm 180 :5.0cm 50cm -20aC 20 C
2.0 kg 3.0 kg PROBLEM 4-8 points 2.0 kg In case 1 and case 2, the...
2.0 kg 3.0 kg PROBLEM 4-8 points 2.0 kg In case 1 and case 2, the boxes are 5.0 kg 5.0 kg 3.0 kg subjected to the same constant force F F directed to the right. The surface is frictionless. Case 1 Case 2 [2 points] (a) Draw one free-body diagram, and use it to come up with an expression for the acceleration of the system. Be clear what you are drawing the free-body diagram of. [2 points] (b) For...
Calculate the radiation dosage (in rads) for an 79-kg person that is exposed for 5.0 seconds...
Calculate the radiation dosage (in rads) for an 79-kg person that is exposed for 5.0 seconds to a 3.0 Ci source of beta radiation. Assume that 100% of the radiation is absorbed and each beta particle has an energy of 2.0 Times 10^-13 J.
Consider vectors A⃗ = 2.0 ι^ + 3.0j^ and B⃗ = -4.0ι^ + 5.0 j^. 1. Calculate A⃗ +...
Consider vectors A⃗ = 2.0 ι^ + 3.0j^ and B⃗ = -4.0ι^ + 5.0 j^. 1. Calculate A⃗ + B⃗ . Express your answer as xι^+yj^. 2. Calculate A⃗ - B⃗ . Express your answer as xι^+yj^. 3. If the direction (but not the magnitude) of B⃗ is allowed to change by any amount you like, how large can |A⃗ + B⃗ | be? 4. If the direction (but not the magnitude) of B⃗ is allowed to change by any amount you like, how small can |A⃗ +...
The masses and coordinates of four particles are as follows: 40 g, x = 1.0 cm,...
The masses and coordinates of four particles are as follows: 40 g, x = 1.0 cm, y = 3.0 cm; 20 g, x = 0.0 cm, y = 4.0 cm; 35 g, x = -3.0 cm, y = -3.0 cm, 45 g, x = -2.0 cm, y = 5.0 cm. What is the rotational inertia of this collection with aspect to the x-axis ( kg m2)? What is the rotational inertia of this collection with aspect to the y-axis? What...
The masses and coordinates of four particles are as follows: 40 g, x = 1.0 cm,...
The masses and coordinates of four particles are as follows: 40 g, x = 1.0 cm, y = 3.0 cm; 20 g, x = 0.0 cm, y = 4.0 cm; 35 g, x = -3.0 cm, y = -3.0 cm, 45 g, x = -2.0 cm, y = 5.0 cm. What is the rotational inertia of this collection with aspect to the x-axis ( kg m2)? What is the rotational inertia of this collection with aspect to the y-axis? What...
The force of gravity between two 2.0 kg objects that are 10.0 cm apart is: G...
The force of gravity between two 2.0 kg objects that are 10.0 cm apart is: G = 6.67 x 10-11 Nom?/kg a) 2.6 x 10-8 N. Ob) 6.8 x 10-'N Oc) 6.8 x 10-12 N O d) 2.7 x 10-12N
Problem 5: A horizontal force F of magnitude 12 N is applied to a 2.0 kg...
Problem 5: A horizontal force F of magnitude 12 N is applied to a 2.0 kg block as that block slides a distance d 0.3 m up a ramp at angle e 35°. Assuming the coefficient of kinetic friction between the block and the ramp is ux 0.4, find the block's change in Kinetic Energy over the displacement d
3. In the figure below the force F = 15 N. Take m1 = 2.0 kg,...
3. In the figure below the force F = 15 N. Take m1 = 2.0 kg, m2 = 5.0 kg, and 0 = 30°. Assume ideal rope and frictionless surface. Find the tension in the rope and the acceleration of the blocks. F m2 mi 0
20.50 1800 N e F 2.2 10 Specity the 2.0 eC 5.0 cm 180 :5.0cm 50cm -20aC 20 C
2.0 kg 3.0 kg PROBLEM 4-8 points 2.0 kg In case 1 and case 2, the boxes are 5.0 kg 5.0 kg 3.0 kg subjected to the same constant force F F directed to the right. The surface is frictionless. Case 1 Case 2 [2 points] (a) Draw one free-body diagram, and use it to come up with an expression for the acceleration of the system. Be clear what you are drawing the free-body diagram of. [2 points] (b) For...
Calculate the radiation dosage (in rads) for an 79-kg person that is exposed for 5.0 seconds to a 3.0 Ci source of beta radiation. Assume that 100% of the radiation is absorbed and each beta particle has an energy of 2.0 Times 10^-13 J.
The force of gravity between two 2.0 kg objects that are 10.0 cm apart is: G = 6.67 x 10-11 Nom?/kg a) 2.6 x 10-8 N. Ob) 6.8 x 10-'N Oc) 6.8 x 10-12 N O d) 2.7 x 10-12N
Problem 5: A horizontal force F of magnitude 12 N is applied to a 2.0 kg block as that block slides a distance d 0.3 m up a ramp at angle e 35°. Assuming the coefficient of kinetic friction between the block and the ramp is ux 0.4, find the block's change in Kinetic Energy over the displacement d
3. In the figure below the force F = 15 N. Take m1 = 2.0 kg, m2 = 5.0 kg, and 0 = 30°. Assume ideal rope and frictionless surface. Find the tension in the rope and the acceleration of the blocks. F m2 mi 0
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