Quarter 2 Benchmark Review
Ch. 5
1. A ball rolls off a 3.00m high table at 5.00m/s. How fast will it be going when it hits the ground? (Cons. of ME)
2. A spring with a spring constant of 73.0 N/m is sitting vertically on a table. The spring is compressed 0.210m
and a 0.350kg shoe is placed on the spring. When the spring is released the shoe shoots into the air.
Neglecting air resistance, how high will the shoe go above where it was put on the spring? (Cons. of ME)
Ch.6
3. A 500kg car traveling at 10.0m/s comes to a stop in 4.00s. a) What was the magnitude of the net force on the
car? (Impulse.) b) How much (net) work is done on the car? (Ch. 5: It’s easiest to NOT use answer from a. and
have to find d, just use Wnet=∆KE.)
4. A .200kg baseball going 2.50m/s to the right collides with a .100kg tennis ball going 3.00m/s in the opposite
direction. After they collide the tennis ball is going 4.00m/s to right. What is the velocity of the baseball?
Ch. 7
5. A girl spins her doll in a horizontal circle above her head by its legs. If she always pulls perpendicular to the
doll’s motion, a) will the doll’s speed change? Why? b) Will the doll’s velocity change? Why?
6. A .100kg ball attached to a string is moving at 3.00m/s in a horizontal circle of radius .400m. What is the
magnitude of the centripetal force on the ball?
1. 9.15 m/s
2. 0.469m
3. a) 1250N b) -25000J
5. a) No, (Still explain) b. Yes, (Still Explain)
6. 2.25N
4. 1.00m/s to the left (or -1.00m/s)
Quarter 2 Benchmark Review
Ch. 5
1. A ball rolls off a 3.00m high table at 5.00m/s. How fast will it be going when it hits the ground? (Cons. of ME)
2. A spring with a spring constant of 73.0 N/m is sitting vertically on a table. The spring is compressed 0.210m
and a 0.350kg shoe is placed on the spring. When the spring is released the shoe shoots into the air.
Neglecting air resistance, how high will the shoe go above where it was put on the spring? (Cons. of ME)
Ch.6
3. A 500kg car traveling at 10.0m/s comes to a stop in 4.00s. a) What was the magnitude of the net force on the
car? (Impulse.) b) How much (net) work is done on the car? (Ch. 5: It’s easiest to NOT use answer from a. and
have to find d, just use Wnet=∆KE.)
4. A .200kg baseball going 2.50m/s to the right collides with a .100kg tennis ball going 3.00m/s in the opposite
direction. After they collide the tennis ball is going 4.00m/s to right. What is the velocity of the baseball?
Ch. 7
5. A girl spins her doll in a horizontal circle above her head by its legs. If she always pulls perpendicular to the
doll’s motion, a) will the doll’s speed change? Why? b) Will the doll’s velocity change? Why?
6. A .100kg ball attached to a string is moving at 3.00m/s in a horizontal circle of radius .400m. What is the
magnitude of the centripetal force on the ball?
1. 9.15 m/s
2. 0.469m
3. a) 1250N b) -25000J
5. a) No, (Still explain) b. Yes, (Still Explain)
6. 2.25N
4. 1.00m/s to the left (or -1.00m/s)