How much force must be applied in order for a 1200 kg car to maintain a velocity of 4 m/s in a frictionless road? A.0 N  B.300 N  C.4800 N  D.4 N 7. Which of the following concepts indicate that an object has been subjected to an unbalanced force? A.The object speeds up.  B.The object slows down.  C.The object changes direction.  D.All of the above 8. How will you describe a rock sitting on a table?  A.A velocity of 0 m/s  B.An acceleration of 0 m/s/s  C.Balanced forces acting on it  D.All of the above

Q: 4) # 8kg object speeds up from 20m/fee to som/sec in 6 secords. a) what is the acceleration b) what…

A: 4) mass of object (m) = 8 kg initial speed (u) = 20 msfinal speed (v) = 50 mstime (t) = 6 seconds

Q: A 841.2 kg car initially moving at 17.39 m/s starts to slow down and comes to a complete stop in…

A: Just replace the values and its done

Q: Melissa was putting on her makeup when she accidentally ran into a stopped car at a red light, 11.01…

A: Using kinematic equations and force relations to solve the problem

Q: 357 kg car is moving at 35–. The driver then accelerates at 3.5 for 18.3s s2 a. How fast is the car…

A: given   m=1857 kg      initial velocity u=35 m/s      acceleration a= 3.5 m/s2     t=18.3 s v = u…

Q: 9. A 100 kg-motorcycle at rest starts to move from point A with a constant acceleration. At that…

A: According to kinematics  S=ut+(1/2)at2 u=Initial speed t=time S= distance travelled a=constant…

Q: %#5. Suppose you push a hockey puck of mass m across frictionless ice for a time At, starting from…

A: The distance can be written as, d=12at2

Q: velocity

A:

Q: A car of mass 250 kg, is accelerated from rest by a net force of 400 N for 20 s.  After this, the…

A: Given: Mass (m) = 250 Kg  time (t1 ) = 20 s  Force (F1) = 400 N  Force (F2) = 100 N

Q: Q11. A table has an 18-kg object placed 0.8 meters from the left table leg. The mass of the table…

A: We have a table of mass m=8 kg and length L=3 m on which an object of mass M=18 kg is kept at a…

Q: National Transportation Safety Board indicates that a person in a car crash has a reasonable chance…

A: Given: The mass of the car is 1700 kg. The maximum acceleration of the car is 300 m/s2. The initial…

Q: object has an initial velocity of 5 m/s East then speeds up to 25 m/s East in 4 seconds. What is the…

A: Given u = 5 m/s v = 25 m/s t = 4 sec

Q: 1. put things in motion? Forces are either a or (both words begin with the letter P) When something…

A:

Q: 5. A 1 kg object initially moving with a constant velocity is subjected to a force of magnitude F in…

A:

Q: 1. A cart of mass 4.2 kg is moving at a velocity of 2.7 m/s but then the force shown in the graph…

A: From the graph, the force at t=5s is 3N. The equation for the velocity of the cart can be obtained…

Q: 1. A cart of mass 4.2 kg is moving at a velocity of 2.7 m/s but then the force shown in the graph…

A: Given: m = 4.2 kg u = 2.7 m/s t=10s a) What is the velocity of the cart at t = 5 s Now, So,

Q: 5. A child holds a sled at rest on a frictionless, snow covered hill. If the sled weighs 77.ON. Find…

A:

Q: In a crash test, a car is driven into a solid wall at a speed of 35 mph. the car's acceleration as…

A:

Q: 5. Use the new equation from question 4 to solve this problem: a 50-kg woman wearing a seatbelt is…

A: Given: The mass of the woman is 50 kg. The velocity of the car is 10 m/s. The time taken to stop the…

Q: A soccer player applies an average force of 250 N during a kick. The kick accelerates a 0.45 soccer…

A:

Q: 2. A force of 3.5 N [N 60° E] and a force of 2.8 N[S 40° W] act on the sane object. Find the net…

A: If a force F is acting such that it is inclined at angle of θ with the horizontal then its component…

Q: 1200-kg car pulls a boat on a trailer. (a) What total force resists the motion of the car, boat, and…

A:

Q: When being unloaded from a moving truck, a 10.0- kilogram suitcase is placed on a flat ramp inclined…

A: Given information:Mass of the suitcase (m) = 10 kgInclination of the ramp (θ) = 36.00Accelration of…

Q: [2.] A dockworker applies a constant horizontal force of 80 N to a block of ice on a smooth…

A: Given, Force applied, F = 80 N Initial velocity, u = 0 m/s Distance, s = 11 m Time taken, t = 5 s…

Q: Q9. An object (4.0 kg) is moving on a frictionless surface at a constant velocity (4 m/s), how mi…

A:

Q: A diver of 50kg jumps from a platform 20m high into a pool. If the diver decelerates at a constant…

A:

Q: 3. A piece of putty and a tennis ball with the same mass are thrown against a wall with the same…

A: Let initial moment of both putty and tennis ball = p   The putty sticks whereas the ball rebounds.

Q: 3. A stalled 1,000- kg car needs a push. Starting at rest, how hard do you have to push to get it up…

A: Given data: Mass of car is, m=1000 kg. Initial velocity of car is, u=0 m/s. Final velocity is, v=10…

Q: A person stands on a scale inside an elevator at rest (see the figure below). The scale reads W =…

A: a)             Given that the weight of the body is (W) = 744N as we know that the weight of the…

Q: Question 5 What velocity would a 5 kg ball need to have a KE= 220? Round your answer to the tenths…

A: Given: Mass of ball is m=5 kg Kinetic energy is KE=220 J

Q: 9. A boy slides down a hill on a sled (total mass of 35 kg) and coasts onto a flat plain with a…

A: Given m= 35 Kg Magnitude of the fractional force = - 30 N Here negative sign shows that the force is…

Q: 2. The figure shows three blocks attached by cords that loop over frictionless pulleys. Block B…

A:

Q: 4. With what velocity will a 4.0kg rock hit the ground if it is dropped from a height of 111m? If…

A:

Q: 1. An adventurous physics professor crosses between two rocks cliffs by slowly going hand over hand…

A: Given: The mass of the professor is 70 kg. The angle is 15o.

Q: 2 Samuel Groth can serve a tennis ball at around 263km/hr. The tennis ball has a mass of about 55g,…

A: Given: Velocity of the ball v=263 km/hr=2631000m3600s=73.05 m/s, Mass of the ball m=55 g, Time t=8…

Q: 1. A boy on a bicycle experiences a net force of 75N for 4.2 seconds. If the boy and the bicycle…

A: Let final velocity of combined mass be v . Than change in momentum after 4.2 s = m(v-0) = 60v .

Q: 66. A 1200 kg car travels at 25 m/s. The brakes are applied and the car slows down at –8.0 m/s². How…

A:

Q: A 7550-kg railroad car travels alone on a level frictionless track with a constant speed of 25.0…

A:

Q: 7. A car (mass 1000 kg) is traveling at 60 mph (26.82 m/s) when the driver notices a cat 50 m ahead…

A:

Q: 1.A 5000-kg truck traveling with a speed of 10 m/s skids to a stop. The truck experiences a 20000N…

A: Mass of the truck = 5000 Kg Its initial velocity = 10 m/s Its Kinetic energy before skidding=…

Q: 4. A constant force of 35N acts on a 10 kg box. The direction of the force is to the left. If the…

A: Given Applied force is F=35 N left ward Mass of box is m=10 kg Initial velocity is v0=0 Time time…

Q: A fisherman has caught a very large, 5.0 kg fish from a dock that is 2.0 m above the water. He is…

A: Given: The mas of the fish is m=5 kg. The distance above the water is s=2 m. The tension is T=60 N.…

Q: A skyscraper elevator travels 20 mm while reaching its cruising speed of 10 m/s. A 90 kg passenger…

A:

Q: 4. A playful kid pushes a grocery cart on a frictionless floor with a constant force of 10 N. The…

A:

Q: An object has an initial velocity of 5 m/s East then speeds up to 25 m/s East in 4 seconds. What is…

A:

Q: (a) What is the ratio of the kinetic energy after the collision to the kinetic energy before the…

A:

Q: **38. A 4-kg toy jet sled is accelerated forward from rest by escaping CO2 from the jet engine After…

A: The frictional force exerted on the toy jet and the snow is,Substitute the values,

Q: 5. Suppose that a 1,328 kg car is traveling at 25 m/s. The car brakes can apply 6,435 N of orce.…

A: mass of car = m = 1328 kg initial velocity = Vi= 25 m/s force = F = 6435 N Final velocity = V = 0 (…

Q: 1) In Figure, a block with mass m = friction until it reaches the path with first length d,= 2 m,…

A: Given: Mass of the block m = 1 kg. Height of the mass h1 = 12 m.