Physics

1. The mass of Kerry and the sledge together is 40 kg.
Sam pushes with a force of 50 N for 4 s.
a. What is the value of the quantity: (force x time) during which the force acts? 50 x 4 = 200
b. So what is the increased momentum of Kerry and the sledge?
c. What speed does Sam get the sledge up to after 4 s?

asked by Jaz
  1. a=F/m = 50/40 =1.25 m/s²
    Δ v=a •Δ t =2•4 = 8 m/s
    Δp= m •Δ v= 40•8 = km•m/s

    posted by Elena

Respond to this Question

First Name

Your Response

Similar Questions

  1. physics

    sledge of mass 80 kg moves over the frozen surface of a lake with a velocity of 30m/s and comes to rest in 5s. find frictional force between the lake and sledge
  2. 10th grade

    A sledge loaded with bricks has a total mass of 18.0 kg nd is plled at constant speed of a rope incllined at 20 degres above the horizontal. The sledge moves a distance of 20.0 m on a horizontal surface. the coefficient of kinetic
  3. physic

    Hi! I try already but, the answer is wrong could you help me to fix it out. A sledge loaded with bricks has a total mass of 17.8 kg and is pulled at constant speed by a rope inclined at 20.8° above the horizontal. The sledge
  4. physic

    Please help me I have no idea how to do this problem at all. Question:A sledge loaded with bricks has a total mass of 17.8 kg and is pulled at constant speed by a rope inclined at 20.8° above the horizontal. The sledge moves a
  5. physic

    Hi! please help A sledge loaded with bricks has a total mass of 17.8 kg and is pulled at constant speed by a rope inclined at 20.8° above the horizontal. The sledge moves a distance of 20.6 m on a horizontal surface. The
  6. physics

    A sledge loaded with bricks has a total mass of 18.9 kg and is pulled at constant speed by a rope inclined at 19.3° above the horizontal. The sledge moves a distance of 19.8 m on a horizontal surface. The coefficient of kinetic
  7. physics

    A sledge loaded with bricks has a total mass of 18.9 kg and is pulled at constant speed by a rope inclined at 19.3° above the horizontal. The sledge moves a distance of 19.8 m on a horizontal surface. The coefficient of kinetic
  8. Math/Physics

    How would you solve this? 1/2 mv^2 - 1/2 m x 25 = mg x 100sin20 I obtained this from the question: A girl on a sledge starts, with a speed of 5 m/s, at the top of a slope of length 100 m which is at an angle of 20 degrees to the
  9. mechanics

    a sledge of mass 25kg is pulled along a smooth frozen lake by a rope which is pulled at an angle of 30 degrees to the horizontal.if the sledge accelerates at 1.5 metres per second, find the tension.
  10. physics

    Two forces act on a 10-kg mass. The first force has a magnitude of 15 N and pushes the mass due North. The second force has a magnitude of 25 N and pushes the force due West. What is the magnitude and direction of the acceleration

More Similar Questions