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Physical Science
Newton’s Second Law
Name: _____________________________________________
Wksht 2
Kasen from Van Date: _______________ Period: _____
1. What is the equation that Newton’s Second Law gives us?
2. Patty has a mass of 60kg and sits on a 15kg sled. Gus pushes her with a force of 300N
across snow with no friction. What will Patty’s acceleration be?
3. Patty sits on the same sled, but this time Gus pushes her with a force of 300N across
grass with a 100N force of friction. What will Patty’s acceleration be this time? (Hint:
sketch a diagram first)
4. According to Newton’s Second Law, if two objects with the same mass are pushed with
two different forces, which will accelerate more, one pushed with a greater force or one
pushed with less force?
5. Alex has a mass of 50kg. Johnny and Alex are ice-skating and Johnny pushes
Alex across the ice with no friction. Alex accelerates at a rate of 5 m/s2. How
much force is Johnny exerting?
6. Bubba the alien is being pushed through space by a rocket pack. Bubba’s mass is 75kg.
He begins with a velocity of 5m/s and in 10 seconds has a final velocity of 15m/s.
a. Calculate Bubba’s acceleration.
b. What force is the rocket pack exerting on Bubba?
7. A bowling ball is rolled with a force of 15 N and accelerates at a rate of
3m/s/s. What is the mass of the bowling ball?
8. A different bowling ball is rolled with the same force but accelerates at a rate of 4m/s/s.
What is the mass of this ball?
9. According to Newton’s Second Law, if two objects are pushed with the same force,
which will accelerate more, an object with more mass or an object with less mass? Think
of an empty shopping cart and a shopping cart that is full of groceries.
10.You are purchasing a stereo from a rather untrustworthy store. You suspect that the
salesman has taken the stereo out of the package and that the box is really filled with
Styrofoam instead. The salesman slides the box across the counter to you with a force of
20N. The box accelerates at 2m/s/s. You know that the mass of the stereo is 15kg. Is the
stereo in the box? How do you know?