A student compresses the spring in a pop-up toy a distance of 0.02m. If 0.068 J of energy are stored in a toy, what is the toy's spring constant? k= $$\frac{\text{2SPE}}{x^2\text{}}$$

A student is standing in an elevator while holding a spring scale that is attached to a 2 kg mass. The student notices that the spring scale reads exactly 20 N. Which motion is NOT possible for the elevator?

A mass of 12 kg is resting on a bathroom scale sitting in an elevator. If the elevator is accelerating downward at 4 m/s2, which force diagram correctly shows the forces acting on the mass?

A steel ball rolls accross a level track a distance of 1.35 m in a time of 0.45 s. What is the velocity of the ball? v= $$\frac{d}{t}$$

A woman is standing on a bathroom scale in an elevator that is accelerating upward at 1.5 m/s2. The bathroom scale reads 600 N. What is the woman's mass? W= acceleration x gravity (9.8)

An objet has a mass of 8 kg. A 2 N force moves the mass at a consant speed 3 m east then 4 m west. How much work is done moving the block?

work= force x distance(3m-4m)

A cart that is .16 m in length passes through a sensor. The reading on the sensor says the velocity was 4.8 m/s during the time it took to pass through the sensor. How long did it take the cart to pass through the sensor?

t = $$\frac{d}{v}$$

A spring has a spring constant of 120 N/m. How much potential energy is stored in the spring as it is stretched 0.2m?

SPE= $$\frac{1}{2}$$ k $$x^2$$

A ramp 1.2 m long rest on a level table with one end elevated 0.4 m above the table surface. A steel ball starts at the elevated end of the ramp and rolls down the ramp through a sensor. If the ball has a mass of 0.045 kg, what is the ball's potential energy at the top of the ramp?

GPE= mass x gravity (9.8) x height

A 750 N ma is standing on a bathroom scale in an elevator. WHen the elevator is moving, the man notices the scales reading is 780 N. Which statement correctly describes the motion of the elevator.

A student pulls a cart up a ramp with a spring scale. If the scale reads 5.6 N and the student pulls the cart 1.4 m, how much work is being done?

W= Force x distance

A student does an experiment rolling a cart down a ramp. The cart starts from rest a distance of 0.8 m up the ramp, and 1.5 s later the cart has a velocity of 2.0 m/s. What is the cart's acceleration? a= $$\frac{v}{t}$$

If the kinetic energy of an object is 32 J when its speed is 4 m/s, then the object's mass must be.. m= $$\frac{2KE\left(J\right)}{v^2}$$

A pop-up toy has a mass of 0.008 kg and a GPE of 0.068 J. What is the max height it reaches? h= $$\frac{GPE}{mass\ x\ gravity\ \left(9.8\right)}$$